Grappling Hooks

It is said that no one is a real caver unless they have ascended a rope that was rigged by throwing a grappling hook, and that no intelligent caver has ever done this. I plead the fifth on this one.

Warning:
Don't trust your life to a grappling hook.

ID	Device	Description	Acquired	Weight	Height	Width	Thickness	Std. volume
1868	BellinghamMakerSpace.org Kickstarter	Collapsible, 4-claw	Garth Haynes, 2015	331	127	127	126	2021
1813	Chinese, Version A	Collapsible, 4-claw	Zhong Zheng, 2013	766	233	78	78	1403
1842	Chinese, Version B	Collapsible, 3-claw	Wang Wei Jie, 2015	397	180	57	34	352
1843	Chinese, Version C	3-claw, forged plated steel	Bonnie Guoguo 郭红柳, 2015	257	142	142	128	2594
1853	Chinese YT0021 Large	Welded, 3-claw, welded eye	Sunpei, 2015	280	184	141	121	3135
1854	Chinese YT0021 Medium	Welded, 3-claw, welded eye	Sunpei, 2015	113	134	112	101	1513
1855	Chinese YT0021 Small	Welded, 3-claw, welded eye	Sunpei, 2015	68	115	94	80	864
1630	CMI	Welded, 5-claw, forged eye	CMI, 2009	1274	318	218	203	14073
1759	Hugh Banner	Welded, 5-blade, welded eye	Tom Furey, 2012	920	480	145	134	9325
1719	Israeli Folding Anchor	Unfinished milled Al backplate and hinged arm, six hardened points on arm	Joseph Healy, 2011	688	145	51	42	312
1861	Jusick	Collapsible, 4-claw	James Jusick, 2015	142	113	112	105	1319
1888	Molibao Gravity Hook	Two-piece, hinged, 4-claw	H T Pow Limited, 2016	268	134	89	89	1056
3762	MR	Collapsible Al, 3-claw, hinged eye	Cesar Sandoval, 2011	724	286	92	81	2151
1826	New2 Survival YT0009	Welded, 3-claw, welded eye	Sunpei, 2014	284	190	154	136	3961
1731	Ninja	Collapsible, 4-claw	?	785	251	218	36	1942
1640	TRG Grabber	Collapsible, 3-claw	TAD Gear, 2009	742	217	103	92	2052
1636	TRG Laser Hook	Two-piece, welded, 4-claw	Sporting Goods Unlimited, 2009	731	163	84	85	1158
1639	TRG Tech-Hook	Welded, 4-claw	TAD Gear, 2009	667	162	83	83	1113