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Handleless Eccentric Cam Ascenders
Hand Ascenders

This section includes mechanical ascenders consisting of a shell or frame and an eccentric cam assembly attached to the shell/frame at a single pivot point. The shell/frame is open on one side to allow admittance of the standing rope. No sling attachment points are provided on the cam. No handle is provided.

I split the Handleless Eccentric Cam Ascenders into these three groups:

These ascenders are generally smaller and lighter than the handled eccentric cam ascenders; conversely, they are more difficult to manipulate, particularly with gloved hands.

The most common hand eccentric cam ascenders have stamped shells, but several manufacturers mill their shells from extruded aluminum alloy. The extruded shells are generally heavier, but far more rugged.

In the ID column and chart, I use a red background for hand ascenders, green for chest ascenders, and blue for emergency ascenders.

Gallery

Image ID Device Description Acquired Weight Height Width Thickness Std. volume Channel Diameter Cam Angle Tooth Pattern
Anthron AB-20 2079 Anthron AB-20 RH, stamped frame, oval & round top holes, slotted & round lower holes, braced cam /w sloping teeth & side mud grooves, pin safety below cam Bob Thrun Collection, 2017 148 105 79 34 279 15.0 24° (3.2)^2(1.2)^2(B)
Camnal Basichold 3406 Camnal Basichold RH, stamped frame, oval top and D bottom hole, stamped cam stop,, semi-web cam /w straight teeth, plastic safety below cam Strade FarEast Ltd. (3cdeal_sfc), 2021 125 111 71 25 200 14.9 31° (3.4)(1S1)^2(2S2)(1S1)^3(2.3.4.3)
Camp Solo, Version A 150 Camp Solo, Version A RH, stamped frame, oval top & round bottom holes, perforated plate cam /w straight teeth, push-button safety latch on cam K&R Adventure Gear, 2001 157 107 79 31 265 13.5 31° (2)(1D1)^7(1)
Camp Solo, Version B 2125 Camp Solo, Version B RH, stamped frame, oval top & round bottom holes, perforated plate cam /w straight teeth, push-button safety latch on cam Bob Thrun Collection, 2017 157 116 75 31 267 13.2 28° (1)(2.3)^4(2.1)
Camp Solo 2 1988 Camp Solo 2 RH, stamped frame, oval top & round bottom holes, drooped cam /w sloping teeth, tab safety /w pull cord below cam Expé-Spelemat, 2014 92 93 55 24 123 14.2 28° (2)(1S1)^7(1)
Climbing Technology Simple 2002
2013
Climbing Technology Simple RH, stamped frame, pear top holes, round bottom hole, hybrid cam /w sloping teeth, double-pin safety with pivot on side of cam
  • Knot & Rope Supply / Amazon.com, 2015
  • Expé-Spelemat, 2015
154 110 75 28 230 15.9 31° (3.4.2)(1H1.2)^3(3.2)
Climbing Technology Simple + 2989 Climbing Technology Simple + RH, stamped frame, pear top holes, round bottom hole, hybrid cam /w sloping teeth, double-pin safety with pivot on side of cam Canyon Store, 2021 154 110 75 28 233 15.7 31° (3.4.2)(1H1.2)^3(3.2)
Clog, Version A 1503 Clog, Version A LH, stamped frame, round bottom hole, plate cam /w "Z" teeth & pin,  Paul Gough, 2009 164 102 84 29 250 14.8 24° (Z)^10, circular cam
Clog, Version B 2097 Clog, Version B RH, stamped frame, round bottom hole, plate cam /w "Z" teeth & pin,  Bob Thrun Collection, 2017 165 103 82 30 253 14.5 mm 27 (Z)^12, circular cam
Clog, Version C 1504 Clog, Version C RH, stamped frame, round bottom hole, plate cam /w "Z" teeth & pin,  Paul Gough, 2009 155 102 80 27 221 14.9 30° (Z)^11, circular cam
Clog, Version D 2096 Clog, Version D LH, stamped frame, round bottom hole, plate cam /w "Z" teeth & pin,  Bob Thrun Collection, 2017 165 103 85 29 255 14.8 31° (Z)^11, circular cam
Clog, Version E 1
212
213
1585
2100
2397
Clog, Version E LH & RH, stamped frame, round top & bottom holes, plate cam /w "Z" teeth & pin, 
  • Eiselin Sport, 1982
  • (2) Craig Kubanoff, 2007
  • Jon Marshall, 2012
  • Bob Thrun Collection, 2017
  • Rick Banning, 2019
165 103 82 35 296 14.8 26° (Z)^13, circular cam
Clog, Version F 2304
2321
Clog, Version F LH & RH, stamped frame, round top & bottom holes, plate cam /w "Z" teeth & pin, 
  • Bill Liebman, 2017
  • John Replinger, 2017
165 104 82 35 300 14.6 17° (Z)^16, circular cam
Clog, Version G 1524
2123
Clog, Version G LH & RH, stamped frame, round top & bottom holes, drilled plate cam /w "Z" teeth, 
  • Steve Sirrs, 2009
  • Bob Thrun Collection, 2017
162 103 84 25 219 14.4 15° (Z)^14, circular cam
Clog, Version H 2
1586
Clog, Version H LH & RH, stamped frame, round top & bottom holes, drilled plate cam /w "Z" teeth, 
  • Eiselin Sport, 1982
  • Jon Marshall, 2012
153 103 82 25 211 14.4 21° (Z)^13, circular cam
Clog, Version I 197
1554
1909
Clog, Version I RH, stamped frame, round top & bottom holes, open-web cam /w straight teeth, 
  • Brian Trevelyan, 2005
  • Vanessa Field, 2010
  • Jean Slade, 2012
152 104 82 25 209 15 22° (4.5)^4(4.3)^4
Clog, Version J 2122 Clog, Version J LH & RH, stamped frame, round top & bottom holes, open-web cam /w straight teeth,  Bob Thrun Collection, 2017 149 104 98 24 240 14.8 22° (4.5)^4(4.3)^4 
Clog, Version K 3
1963
2004
2124
3461
Clog, Version K LH & RH, stamped frame, round top & bottom holes, open-web cam /w straight teeth, 
  • Ligonier Mountain Outfitters, 1978
  • John Creelman, 2013
  • G.I. Joe Army Stores, 2015
  • Bob Thrun Collection, 2017
  • On Rope 1, 2021
148 104 98 25 255 15 22° (4.5)^4(4.3)^4
Clog, Version L 2121 Clog, Version L LH & RH, stamped frame, round top & bottom holes, open-web cam /w straight teeth,  Bob Thrun Collection, 2017 158 105 97 26 260 16.4 mm 22 (4.5)^4(4.3)^4 
Clog, Version M 1512
1904
1964
2005
Clog, Version M LH & RH, stamped frame, round top & bottom holes, cam stop, open-web cam /w straight teeth, 
  • Kieron Kent, 2009
  • Brittany Jacobs, 2012
  • John Creelman, 2013
  • G.I. Joe Army Stores, 2015
157 104 98 26 262 16 22° (4.5)^4(4.3)^4
Clog, Version N 1584 Clog, Version N RH, stamped frame, round top & 2 bottom holes, open-web cam /w straight teeth,  Jon Marshall, 2012 161 105 99 25 253 16.3 22° (4.5)^4(4.3)^4 
Clog, Version O 1557
2006
Clog, Version O LH & RH, stamped frame, round top & 2 bottom holes, open-web cam /w straight teeth, 
  • Simon Green, 2011
  • G.I. Joe Army Stores, 2015
160 104 97 25 258 16.3 22° (4.5)^4(4.3)^4 
Clog, Version P 233 Clog, Version P LH, stamped frame, round top & 2 bottom holes, cam stop, open-web cam /w straight teeth,  Erica Harley, 2007 156 104 98 26 262 15 22° (4.5)^4(4.3)^4
Clog, Version Q 196 Clog, Version Q RH, stamped frame, round top & 2 bottom holes, open-web cam /w straight teeth,  Jim Halstead, 2005 155 104 99 32 325 15 22° (4.5)^4(4.3)^4
CMI Shorti, Version A 2117 CMI Shorti, Version A RH, extruded frame, triangular top & bottom holes, open-web cam /w straight teeth, safety lever above cam Bob Thrun Collection, 2017 160 116 76 25 220 14.3 28° (2)(5.4)^4(3.4)^2(3.2)^2
CMI Shorti, Version B 4/5 CMI Shorti, Version B LH & RH, extruded frame, triangular top & bottom holes, open-web cam /w straight teeth, safety lever above cam Speleoshoppe, 1979 175 116 76 25 220 14.3 28° (2)(5.4)^4(3.4)^2(3.2)^2
CMI Shorti /w pin kit 240
2116
CMI Shorti, Version B
/w Version A Optional Safety Pin Kit installed
LH & RH /w v. A pin, extruded frame, triangular top & bottom holes, open-web cam /w straight teeth, safety lever above cam
  • Sheryle Bauer, 2005
  • Bob Thrun Collection, 2017
  • Kit: Pathfinder Sports ca. 1980
175 116 76 25 220 14.3 28° (2)(5.4)^4(3.4)^2(3.2)^2
CMI Shorti, Version C 3458 CMI Shorti, Version C LH & RH, extruded frame, triangular top & bottom holes, plated open-web cam /w straight teeth, safety lever above cam Richard Morse, 2021 166 116 76 28 244 14.3 28° (2)(5.4)^4(3.4)^2(3.2)^2
CMI Shorti II, Version A 222
3462
CMI Shorti II, Version A LH & RH, extruded frame, triangular top & bottom holes, braced cam /w straight teeth, safety lever above cam
  • Charles Knowles, 2007
  • On Rope 1, 2021
168 116 76 28 244 14.4 31° (2)(5.4)^4(3.4)^2(3.2)^2
CMI Shorti II, Version B 2095 CMI Shorti II, Version B LH & RH, extruded frame, triangular top & bottom holes, braced cam /w straight teeth, safety lever above cam Bob Thrun Collection, 2017 176 116 76 27 240 14 29° (1.4.3.3.4)(3.2)^6
CMI Shorti II /w pin kit " CMI Shorti II, Version B
/w Version A Optional Safety Pin Kit installed
LH & RH /w v. A pin, extruded frame, triangular top & bottom holes, braced cam /w straight teeth, safety lever above cam
  • Bob Thrun Collection, 2017
  • Kit: Bob & Bob, 2017
189 116 76 37 328 14 29° (1.4.3.3.4)(3.2)^6
CMI Shorti III, Version A 6/7 CMI Shorti III, Version A LH & RH, extruded frame, triangular top & bottom holes, braced cam /w straight teeth, safety lever above cam Pathfinder Sports, 1981 194 120 79 28 265 17.4 29° (1)(2.3)^2(4.3)(2.3)^5(2)
CMI Shorti III, Version A /w pin kit 7 CMI Shorti III, Version A
/w Version A Optional Safety Pin Kit installed
RH /w v. A pin, extruded frame, triangular top & bottom holes, braced cam /w straight teeth, safety lever above cam
  • Pathfinder Sports, 1981
  • Kit: Pathfinder Sports ca. 1980
205 120 79 37 351 17.4 29° (1)(2.3)^2(4.3)(2.3)^5(2)
CMI Shorti III, Version B 2923 CMI Shorti III, Version B LH & RH, extruded frame, triangular top & bottom holes, braced cam /w straight teeth, safety lever above cam Irvin Stickell, 2019 187 120 76 28 260 17.3 27° (5.4)^2(3.4)^3(3.2)
CMI Shorti IV 8
1508
3463
CMI Shorti IV LH & RH, extruded frame, triangular top & bottom holes, braced cam /w straight teeth, safety lever above cam
  • Inner Mountain Outfitters, 1989
  • James Lucchesi, 2009
  • On Rope 1, 2021
196 121 78 29 274 17.2 27° (5.4)^2(3.4)^3(3.2)
CMI Shorti IV /w pin kit 2072 CMI Shorti IV
/w Version B Optional Safety Pin Kit installed
LH & RH, extruded frame, triangular top & bottom holes, braced cam /w straight teeth, safety lever above cam
  • Bob Thrun Collection, 2017
  • Kit: Bob & Bob, 2017
170 116 76 37 327 17.2 27° (5.4)^2(3.4)^3(3.2)
GDS2387_5187 2387 Fort RH, stamped frame, oval top and D bottom hole, stamped cam stop,, semi-web cam /w straight teeth, plastic safety below cam Raminta Pilioniene, Quality For You, 2019 126 112 73 23 191 14.6 31° (3.4)(1S1)^2(2S2)(1S1^2)(2.3.4.3)
Greenwald Hand Cam 227 Greenwald Hand Cam Ambidextrous, steel shell, cut cam with needle bearing, pin axle, rubber cam closer, noncommercial, ,  Bill Greenwald, 2007 335 73 69 32 160 13.0 27° Z^4
heightec Compact D41 2960 heightec Compact D41 RH, stamped Al frame, oval top holes, 2 round lower holes, pin cam stop, semi-open web cam /w straight teeth, plastic safety below cam Kyle Evans, 2020 169 112 71 27 217 16.5 18° (1.2)^8
heightec-PMI Compact D41A, Version A 254
2126
heightec-PMI Compact D41A, Version A RH, stamped Al frame, oval top holes, 2 round lower holes, pin cam stop, open-web cam /w straight teeth, pin safety below cam
  • On Rope 1, 2008
  • FRHAM Safety Products, Inc, 2013
  • Bob Thrun Collection, 2017
164 113 72 27 218 15.8 26° (1.2^3)^2(1.2)^2(B)
heightec-PMI Compact D41A, Version B 1528
1966
2127
heightec-PMI Compact D41A, Version B RH, stamped Al frame, oval top holes, 2 round lower holes, pin cam stop, open-web cam /w straight teeth, plastic safety below cam
  • On Rope 1, 2009
  • Bob Thrun Collection, 2017
160 112 73 26 218 13.6 26° (1.2^3)^2(1.2)^2(B)
heightec-PMI Rescue Compact D41A/ D44 Rope Grab/ D44A 255
2128
heightec-PMI Rescue Compact D41A/ D44 Rope Grab/ D44A RH, stamped SS frame, 2 round lower holes, pin cam stop, open-web cam /w straight teeth, pin safety below cam
  • On Rope 1, 2008
  • Bob Thrun Collection, 2017
300 113 80 25 229 15.4 26° (1.2^3)^2(1.2)^2(B)
Kong-Bonaiti Modular, Version A 22
2203
Kong-Bonaiti Modular, Version A LH & RH, modular, stamped frame, round & D top holes, round bottom hole, stamped cam stop, asymmetrical open-web cam /w sloping teeth, pin safety below cam
  • Inner Mountain Outfitters, 1992
  • Bob Thrun Collection, 2017
148 110 79 37 322 15.5 30° (3)(4.H)^2(3.H)^2(2.2.1)
Kong-Bonaiti Modular, Version B 1558 Kong-Bonaiti Modular, Version B LH & RH, modular, stamped frame, round & D top holes, round bottom hole, stamped cam stop, asymmetrical open-web cam /w sloping teeth, pin safety below cam Brent Fader, 2011 155 114 79 27 240 15.4 30° (3)(4.H)^2(3.H)^2(2.2.1)
Kong-Bonaiti Modular, Version C 2118 Kong-Bonaiti Modular, Version C RH, stamped frame, round & D top holes, round bottom hole, stamped cam stop, asymmetrical open-web cam /w sloping teeth, tab safety below cam Bob Thrun Collection, 2017 158 113 79 28 251 15.7 30° (3)(4.H)^2(3.H)^2(2.2.1)
Kong Modular 2990 Kong Modular RH, stamped frame, round & D top holes, round bottom hole, stamped cam stop, asymmetrical open-web cam /w sloping teeth, pin safety below cam Zoro Tools Inc., 2021 158 114 79 25 222 15.5 26° (1.2^3)^2(1.2)^2(B)
Krok Basic, Version A 2992 Krok Basic, Version A, 3602_0451.37 (Бейсик) RH, stamped & painted Al shell, hybrid cam /w straight teeth, double-pin safety with pivot on side of cam Krok, 2021 148 102 75 30 231 16.1 31° (3.2.2)(1H1.2)^3(2.3.2)
Krok Basic, Version B 2993/2994 Krok Basic, Version B, 3602_0445.36/ 3602_0445.36
(Бейсик)
LH & RH, stamped & painted steel shell, hybrid cam /w straight teeth, double-pin safety with pivot on side of cam Krok, 2021 194 104 73 29 220 16.4 31° (3.2.2)(1H1.2)^3(2.3.2)
Krok Multipurpose Ascender 1583 Krok Multipurpose Ascender RH, stamped & painted Al shell, hybrid cam /w straight teeth, double-pin safety with pivot on side of cam Gear4Rocks, 2012 142 102 76 30 231 15.5 32° (3.2)(2.2.H)^3(2.2.3.2)
Lucky AB-20 Bloquer 166 Lucky AB-20 Bloquer RH, stamped frame, oval & round top holes, slotted & round lower holes, braced cam /w sloping teeth & side mud grooves, pin safety below cam Barrabes.com, 2003 148 105 77 31 245 15 24° (3.2)^2(1.2)^2(B)
Petzl Basic, Version A 2130 Petzl Basic, Version A RH, stamped frame, unfinished, round top & round bottom holes, open cam /w "Z" teeth, tab safety below cam Bob Thrun Collection, 2017 116 101 77 23 177 14.9 19° 14 "z" teeth
Petzl Basic, Version B 202
1539
1540
2129
Petzl Basic, Version B LH & RH, stamped frame, unfinished, round top & round bottom holes, open cam /w "Z" teeth, tab safety below cam
  • Luc Bourguignon, 2005
  • Julian Turner, 2010
  • Julian Turner, 2010
  • Bob Thrun Collection, 2017
113 100 76 24 184 14.9 22° 12 "z" teeth,
sprue between 5 & 6
Petzl Basic, Version C 12 Petzl Basic, Version C RH, stamped frame, round top & round bottom holes, open cam /w "Z" teeth, tab safety below cam Speleoshoppe, 1980 122 100 76 24 182 15.5 22° 12 "z" teeth,
sprue between 5 & 6
Petzl Basic, Version D 13 Petzl Basic, Version D RH, stamped frame, round top & round bottom holes, open cam /w "Z" teeth, tab safety below cam Speleoshoppe, 1980 119 100 76 24 182 16.2 22° 12 "z" teeth,
sprue between 5 & 6
Petzl Basic, Version E 14
1592
Petzl Basic, Version E RH, stamped frame, round top & round bottom holes, semi-open web cam /w sloping teeth, pin safety below cam Speleoshoppe, 1979 138 100 76 26 198 16.7 25° (F)(3.4)^3, (3.2)^2(1)
Petzl Basic, Version F 1553 Petzl Basic, Version F RH, stamped frame, round top & round bottom holes, semi-open web cam /w sloping teeth, pin safety below cam Julia Bloomer, 2011 141 102 78 24 194 17.1 28 (3.4)^2(3.2)^2(1)
Petzl Basic, Version G 1577 Petzl Basic, Version G RH, stamped frame, oval + round top & round bottom holes, semi-open web cam /w sloping teeth, pin safety below cam Geoffrey Storey, 2012 144 102 77 26 206 17.1 28° (3.4)^2(3.2)^2(1.2)
Petzl Basic, Version H 15 Petzl Basic, Version H RH, stamped frame, oval + round top & round bottom holes, pin cam stop, semi-open web cam /w sloping teeth, pin safety below cam Bob & Bob, 1988 145 102 76 26 202 15 25° (2.3)(1S1.2S2)(1S1)^4(1.2)
Petzl Basic, Version I 1570 Petzl Basic, Version I RH, stamped frame, oval + round top & round bottom holes, pin cam stop, hybrid cam /w sloping teeth, hybrid cam /w sloping teeth Dane Hardinge, 2012 144 102 78 29 229 15.0 25° (2.3)(2S2.1S1)^2(1S1)^3(1.2)
Petzl Basic, Version J 2066 Petzl Basic, Version J RH, stamped frame, oval + round top & round bottom holes, pin cam stop, hybrid cam /w sloping teeth, hybrid cam /w sloping teeth Bob Thrun Collection, 2017 147 102 78 31 245 15.0 25° (2.3)(2S2.1S1)^2(1S1)^3(1.2)
Petzl Basic, Version K 1912 Petzl Basic, Version K RH, stamped frame, oval + round top & round bottom holes, pin cam stop, hybrid cam /w sloping teeth, hybrid cam /w sloping teeth Bob & Bob, 1997 139 102 76 35 226 14.8 32° (3.1.4)(1S1.2S2)^2(1S1.2.3)
Petzl Basic, Version L 2917 Petzl Basic, Version L RH, stamped frame, oval + round top & round bottom holes, pin cam stop, hybrid cam /w sloping teeth, hybrid cam /w sloping teeth Bellingham Second Chance, 2019 150 115 76 26 223 15.0 25° (2.3)(2S2.1S1)^2(1S1)^3(1.2)
Petzl Basic, Version M 2083
3464
Petzl Basic, Version M RH, stamped frame, oval + round top & round bottom holes, pin cam stop, hybrid cam /w sloping teeth, hybrid cam /w sloping teeth
  • Bob Thrun Collection, 2017
  • On Rope 1, 2021
152 82 78 28 249 15.0 25° (2.3)(2S2.1S1)^2(1S1)^3(1.2)
Petzl Basic, Version N 125 Petzl Basic, Version N RH, stamped frame, oval top & round bottom carabiner & keeper holes, stamped cam stop, semi-open web cam /w sloping teeth, pin safety below cam
  • Bob & Bob, 1997
  • Bob Thrun Collection, 2017
139 102 76 35 271 14.8 32° (3.4)(1S1.2S1)^2(1S1.2.3)
Petzl Basic, Version O 2082
2918
3465
Petzl Basic, Version O RH, stamped frame, oval top & round bottom carabiner & keeper holes, stamped cam stop, semi-open web cam /w sloping teeth, pin safety below cam
  • Bob Thrun Collection, 2017
  • Bellingham Second Chance, 2019
  • On Rope 1, 2021
136 104 76 33 260 14.8 32° (3.1.4)(1S1.2S2)^2(1S1.2.3)
Petzl Basic, Version P 277
2084
Petzl Basic, Version P RH, stamped frame, oval top & round bottom carabiner & keeper holes, stamped cam stop, semi-open web cam /w sloping teeth, pin safety below cam
  • On Rope 1, 2009
  • Bob Thrun Collection, 2017
137 104 76 33 261 14.7 30° (3.1.4)(1S1.2S1)^2(1S1.2.3)
Petzl Basic, Version Q 1943
2059
2398
Petzl Basic, Version Q RH, stamped frame, round top & D-shaped bottom carabiner holes, semi-open web cam /w sloping teeth, pin safety below cam
  • On Rope 1, 2013
  • Bob Thrun Collection, 2017
  • NSS Convention, 2019
87 103 60 26 161 13.2 38° (3.4)((1S1)^2.2S2)^2(3.4.3)
Proverti CD 201 2019 Proverti CD 201 LH, extruded frame, pear top & bottom holes, asymmetrical open-web cam /w sloping teeth, tab safety below cam Ondřej Belica, 2015 219 134 84 30 333 16.4 42° (3)(4.H)^2(3.H)^2(3.2.2)
Proverti CD 202 2034 Proverti CD 202 RH, extruded frame, pear top & bottom holes, asymmetrical open-web cam /w sloping teeth, tab safety below cam Ondřej Belica, 2015 219 134 84 30 333 16.4 42° (3)(4.H)^2(3.H)^2(3.2.2)
Repetto Stal'in 248 Repetto Stal'in RH, stamped frame, pear top holes, round bottom hole, stamped cam stop, hybrid cam /w sloping teeth, double-pin safety with pivot on side of cam Expé-Spelemat, 2008 154 110 74 28 232 16.5 31° (3.4.2)(1H1.2)^3(3.2)
Rollgliss R250 3417 Rollgliss R250 RH, stamped frame, round lower hole, braced cam /w sloping teeth & side mud grooves, pin safety below cam JohnBoysGear, 2021 161 105 76 33 260 15.1 24° (3.2)^2(1.2)^2(B)
Single Rope Technique A3 EXP 6 146 Single Rope Technique Equipment A3 EXP 6 LH & RH, 16 mm rope, extruded frame, 2 top &2 round bottom holes (different sizes), semi-web cam /w straight teeth, pin safety below cam Single Rope Technique Equipment, 2000 280 113 82 31 282 17.9 29° (3.4)^2(5.4)^2(3.4)^2(F)
Single Rope Technique A3 Explorer, Version A 2207 Single Rope Technique Equipment A3 Explorer, Version A RH, extruded frame, 2 top & 2 round bottom holes (different sizes), semi-web cam /w straight teeth, pin safety below cam Bob Thrun Collection, 2017 229 111 78 26 223 14.5 27° (4.5)^3(4.3)^2(4.F)
Single Rope Technique A3 Explorer, Version B 18 Single Rope Technique Equipment A3 Explorer, Version B RH, extruded frame, 2 top & 2 round bottom holes (different sizes), semi-web cam /w straight teeth, pin safety below cam Inner Mountain Outfitters, 1994 239 114 78 27 240 14.5 25° (F)(4.3)^5(4.F)
Single Rope Technique G.P., Version A 16
2120
Single Rope Technique Equipment G.P., Version A LH & RH, extruded frame, round top & bottom holes, semi-web cam /w straight teeth, 
  • Inner Mountain Outfitters, 1988
  • Bob Thrun Collection, 2017
176 96 76 26 190 13.9 26° (4.5)^3(4.3^)3
Single Rope Technique G.P., Version B 1969 Single Rope Technique Equipment G.P., Version B RH, extruded frame, round top & bottom holes, semi-web cam /w straight teeth,  Melody Dawson, 2013 182 96 76 26 187 13.9 26° (4.5)^3(4.3^)3
Skylotec Get Up Rope 3453 Skylotec Get Up RH, stamped frame, lower clevis, pear top holes, drooped cam /w cutouts & sloping teeth, tab safety /w pull cable below cam Safe Rescue LLC, 2021 125 95 65 38 236 14.8 27° (3.4.3)(2S2.1S1)^2(1S1)(3.2)
Southpaw, Version A 260
2091
Southpaw Height Adjuster 5000, Version A RH, extruded frame, triangular bottom hole, braced cam /w straight & "Smilodon" teeth, safety lever above cam
  • Logan Garrison, 2008
  • Bob Thrun Collection, 2017
204 120 78 29 265 17.7 30° (5.4.2)(4.3)^4(2)
Southpaw, Version B 1538
2092
Southpaw Height Adjuster 5000, Version B RH, extruded frame, triangular bottom hole, braced cam /w straight & "Smilodon" teeth, safety lever above cam
  • Mike Bessette, 2010
  • Bob Thrun Collection, 2017
200 120 77 28 256 17.7 30° (5.4.2)(4.3)^4(2)
Spelet Dolní 1955 Spelet Dolní RH, stamped frame, oval and round top holes, round bottom hole, semi-open web cam /w sloping teeth, knob safety below cam Ondřej Belica, 2013 139 103 74 27 209 16.0 27° (F)(3.4)^3(3.2)^2(3)
Spent Universální 1957 Spent Universální RH, stamped frame, round holes, pin cam stop, Al plate cam /w hard insert teeth, pin safety below cam Ondřej Belica, 2013 153 109 77 26 220 15.2 22° (3.2)^5
Russian copy of Petzl Basic 21
2119
Uola RH, stamped frame, 2 round top & round bottom hole, semi-open web cam /w sloping teeth, knob safety below cam
  • John E. Weinel, Inc., 1990
  • Bob Thrun Collection, 2017
138 108 76 29 238 15.2 28° (4.3)^2(2)(2S2)^2(1S1)(2.3)^2(2)
Ural Alp Mini 179 Ural Alp Mini RH, Al back, steel cam, swinging Ti front plate, plate cam /w straight teeth,  Ural Sport, 2004 130 85 69 34 200  15.2  23° (3.2)^3
VauDe AB-20 Bloquer 135 VauDe AB-20 RH, stamped frame, oval & round top holes, slotted & round lower holes, braced cam /w sloping teeth & side mud grooves, pin safety below cam Inner Mountain Outfitters, 1999 153 108 76 30 246 15 24° (3.2)^2(1.2)^2(B)
Walkosz i Spółka Hand 2099 Walkosz i Spółka Hand RH, stamped frame, oval & round top holes, round lower hole, pin cam stop, hybrid cam /w sloping teeth, knob safety below cam Bob Thrun Collection, 2017 157 103 81 28 230 16.7 27° (1S1.2S2)^2(1S1)^4(1.2)
Emergency Chest

Eccentric Cam Ascender Weight Chart