Handleless Eccentric Cam 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.

These ascenders generally sacrifice utility and ease of use for reduced size and weight. Most people reserve these only for emergency use, although they have some other specialized uses.

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

ID	Device ↓	Description	Acquired	Weight ↓	Height ↓	Width ↓	Thickness ↓	Std. volume ↓	Channel Diameter ↓	Cam Angle ↓	Tooth Pattern ↓
2374	Beal Tract Up	Ambidextrous, stamped Al shell, extruded Al cam, carabiner hole	Stacy Williams (climbing-dressage-gear), 2018	89	34	66	31	70	15.5	17	12 round
1962 1989	Climbing Technology Roll N Lock	Ambidextrous, stamped Al shell, cast SS & stamped Al cam, pulley, hold-open catch, carabiner hole	Outdoor Supply LLC, 2013 Expé-Spelemat, 2014	81	34	69	32	75	17.3	17	(Z)^5
3424	Edelweiss MicroB	Ambidextrous, stamped Al shell, extruded Al cam, carabiner hole	Buffalo Gap Outfitters, 2021	86	34	66	31	70	15.3	13	(ZZ)^3(Z)
288 1517 2131	Kong Duck	LH, Al case, steel cam, swinging front plate, Z teeth, carabiner hole	Expé-Spelemat, 2009 On Rope 1 Bob Thrun Collection, 2017	68	66	31	30	60	15.1	20	(Z)^10
1594	Krok Mini, Version A	Ambidextrous, stamped Al shell, toothed cam, carabiner hole	Gear4Rocks, 2012	77	35	62	28	61	13.5	21	(2.H.2)^3(2.3.2)
1597	Krok Mini, Version B	Ambidextrous, stamped Al shell, toothed cam, carabiner hole	Krok (Alex Dniprovsky & Alex Kostromitinov), 2012	79	33	63	28	59	13.5	21	(2.H.2)^3(2.3.2)
183	Stregor, Version A	Ambidextrous, stamped Al shell, milled cam, Z teeth, carabiner hole	Ural Sport, 2004	77	38	56	29	61	16.5	24	(Z)^10
184	Stregor, Version B	Ambidextrous, stamped Ti shell, milled cam, Z teeth, carabiner hole	Ural Sport, 2004	77	38	56	26	56	16.5	24	(Z)^10
3559	Trophyline Kong Duck	Ambidextrous, Al case, steel cam, swinging front plate, Z teeth, carabiner hole	Brad Laddusire, 2022	69	66	31	30	60	15.1	20	(Z)^10
180	Ural Alp (Урал АлЬп) Mouse 10.21, Version A	RH, Ti case, steel cam, swinging front plate, straight teeth, carabiner hole	Ural Sport, 2004	93	65	32	35	73	15.2	20	(3.2)^3
189	Ural Alp (Урал АлЬп) Mouse 10.21, Version B	RH, Ti case, steel cam, swinging front plate, straight teeth, carabiner hole	Ural Sport, 2005	94	65	33	35	74	15.2	20	(3.2)^3
3523	Ural Alp (Урал АлЬп) Mouse 10.21, Version C	RH, Ti case, steel cam, swinging front plate, straight teeth, carabiner hole	Michael Miller, 2022	90	65	32	35	73	15.2	20	(3.2)^3
119 121 2133	Wild Country Ropeman, Version A	Ambidextrous, stamped SS shell, extruded cam, Z teeth, carabiner hole	Exkursion, 1996 John E. Weinel, Inc., 1996 Bob Thrun Collection, 2017	60	38	53	32	64	16.0	26	(Z)^10
2346	Wild Country Ropeman, Version B	Ambidextrous, stamped SS shell, extruded cam, Z teeth, carabiner hole	Bill Liebman, 2017	60	38	54	31	64	16.0	26	(Z)^10
2309	Wild Country Ropeman, Version C	Ambidextrous, stamped SS shell, extruded cam, Z teeth, carabiner hole	Bob Thrun Collection, 2017	60	38	53	32	64	16.0	26	(Z)^10
138 2132	Wild Country Ropeman II	Ambidextrous, stamped SS shell, forged toothed SS cam, carabiner hole	Mountain Gear, 1999 Bob Thrun Collection, 2017	90	38	53	32	64	16.5	23	(3.4)^2, (2.4)^4(2)^2
3628	Wild Country Ropeman 4	Ambidextrous, anodized forged Al shell, extruded cam, Z teeth, SS keeper on cam, carabiner hole.	Amazon.com, 2024	72	36	68	28	69	15.4	19	(Z)^11
1935 2134	Wild Country Ropeman Mk. 1F	Ambidextrous, forged SS shell, extruded cam, Z teeth, carabiner hole	Backcountry Gear, 2012 Bob Thrun Collection, 2017	63	54	37	32	63	16.0	23	(Z)^10
1936 2135	Wild Country Ropeman Mk. 2F	Ambidextrous, forged SS shell, forged toothed SS cam, carabiner hole	Backcountry Gear, 2012 Bob Thrun Collection, 2017	92	54	37	32	63	16.0	25	(3.4)^2(2.4)^4(2)^2
1937 2136	Wild Country Ropeman Mk. 3F	Ambidextrous, forged SS shell, extruded cam, Z teeth, carabiner hole	Backcountry Gear, 2012 Bob Thrun Collection, 2017	69	63	30	27	53	15.5	23	(Z)^14