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Rope Grabs

Rope Grabs are industrial devices used to protect workers in high places. Their function is to ensure that the worker doesn't perform the big splat when falling from high places; however, they are often used with safety belts that can cause a slower and far less spectacular death by suffocation. This can't be blamed on the rope grab, its the fault of the uninformed user.

My interest in rope grabs is that they are similar to ascenders, and suggest alternate ideas for ascender design. I often discuss these in this context instead of the context of their intended use.

Gallery

Image ID Device Description Acquired Weight Height Width Thickness Std. volume
Ace Metal Products FP-7202G-3-LG-2-1 1702 Ace Metal Products FP-7202G-3-LG-2-1 Steel, dual type 1 lever cams, for 5/8 inch (16 mm) rope. Hardware Sales, 2010 454 124 68 24 201
Ace Metal Products FP-7103G-S Presto 1703 Ace Metal Products FP-7103G-S Presto Steel, type 1 lever cam, stamped eye, for 1/2 - 5/8 inch (13-16 mm) rope. Hardware Sales, 2010 584 130 99 65 831
Atlas Kwik-Stop Model 6275 660 Atlas Kwik-Stop Model 6275 Al, lever-activated sliding block, for 5/8-3/4 inch (16-19 mm.) nylon rope. Bob Elron 1227 176 157 51 1409
Barrow/Hepburn Everest Camlock 765 Barrow/Hepburn Everest Camlock Al tube, plastic guides, ball locks, dual lever eBay, Leeds, UK, 2002 757 157 137 83 1785
Camp Goblin 1859
2369
Camp Goblin Forged Al frame & swinging side plate, forged ss levers & anvil
  • Patroller Supply, 2015
  • Bob Thrun Collection, 2017
278 75 86 28 184
Camp Goblin (prototype) 1810 Camp Goblin (prototype) Forged Al frame & swinging side plate, forged ss levers & anvil, unmarked prototype Denis Pivot, 2013 272 71 65 29 134
Climb Right 85525 1657 Climb Right 85525 Bent Al frame, milled Al cam, bolt axle, stranded springwire WesSpur Tree Equipment, 2009 193 76 74 44 250
Climb Right 85525 2649 Climb Right 85535 Bent Al frame, milled Al cam, QR pin axle, stranded springwire Bob Thrun Collection, 2017 205 77 71 64 351
Climb Right 85525 2648 Climb Right 85538 Milled Al frame, milled Al cam, QR pin axle, stranded springwire Bob Thrun Collection, 2017 203 76 66 64 323
Climb Right 85525 2632 Climb Tech Steel, type 1 lever cam, stamped eye, for 1/2 - 5/8 inch (13-16 mm) rope. Bob Thrun Collection, 2017 537 78 93 64 464
Climbing Technology Easy Move, Version A 1836 Climbing Technology Easy Move, Version A  Aluminum side plates, spring-loaded pivot arm, fixed anvil, lever lock Expé-Spelemat, 2014 202 69 81 24 134
Climbing Technology Easy Move, Version B 1837 Climbing Technology Easy Move, Version B Aluminum side plates, spring-loaded pivot arm, fixed anvil, lever lock Lior Porian, 2015 202 69 81 24 134
Croatian 1801 Croatian Steel, type 1 lever cams, for 12 mm rope Mladen Skeja, 2013 288 109 92 27 272
DBI/SALA Lad-Saf L-3330 804 DBI/SALA Lad-Saf L-3330 Cast steel body, lever-actuated cam block, open side, for 3/8-in cable Harry Rogers, 2004 690 135 133 32 575
DBI/SALA Lad-Saf LS-038 803 DBI/SALA Lad-Saf LS-038 Steel, lever-actuated sliding cam /w pulley, 2 QR pin closure, for 3/8-in cable Harry Rogers, 2004 892 180 132 61 1449
DBI/SALA Lad-Saf LS-58 670 DBI/SALA Lad-Saf LS-58 Steel, wedging roller, for 5/8 inch (16 mm.) synthetic rope. John Murray, 1993 1127 190 109 51 1056
DBI/SALA LS-1441, Version A 817 DBI/SALA LS-1441, Version A Milled & stamped steel, rear gate, lever & wedge roller action Len Nicolai, 2005 720 165 104 47 803
DBI/SALA LS-1441, Version B 1710 DBI/SALA LS-1441, Version B Milled & stamped steel, rear gate, lever & wedge roller action LittleLots, 2011 714 156 101 48 755
1863 DMM Buddy BUD100 Forged Al side plates, pivoting Al arm, fixed anvil, for 11-13 mm. rope Arbor Tech Supply, 2012 200 64 103 28 186
DMM Buddy 1777
2641
DMM Buddy BUD200 Forged Al side plates, pivoting Al arm, fixed anvil
  • Arbor Tech Supply, 2012
  • Bob Thrun Collection, 2017
200 64 103 28 186
Fusion Puma FP-7208-AS 2674 Fusion Puma FP-7208-AS Milled and painted aluminum frame, cast cam on cable springwire, QR pin axle on cable keeper Fusion Climb online, 2017 328 111 97 62 672
Fusion Puma FP-7208-AS 1655 Fusion Puma FP-7208-AS Milled and painted aluminum frame, cast cam on cable springwire, QR pin axle on cable keeper Yi-tien Tuan, 2009 330 111 96 63 663
Gemtor VF649 1814 Gemtor VF649 SS, type 1 lever cam with slot-guided roller, flat opposing plate, for 5/8" or 3/4" rope Brian Kallfelz, 2013 712 109 109 45 534
Gemtor VW651 1652 Gemtor VW651 SS, type 1 lever cam with slot-guided roller, flat opposing plate, for 5/16" cable East End Pawn Shop, 2009 1034 119 104 33 412
heightec-PMI Vector 1707
2636
heightec-PMI Vector D23A Stamped Al side plates, pivoting cast steel cam, cast Al anvil
  • On Rope 1, 2010
  • Bob Thrun Collection, 2017
219 69 101 29 198
Hugh Banner 1755 Hugh Banner, Version A Forged painted frame, hardcoated Al cam, SS axle, spring-loaded axle latch Tom Furey, 2012 207 98 72 49 340
Hugh Banner Prototype 1760 Hugh Banner, Version B Forged painted frame, hardcoated Al cam, SS axle Tom Furey, 2012 204 98 72 45 320
ISC Large Fishhook 1728 ISC Large Fishhook Milled painted Al frame & Al cam, QR Pin /w retaining pin Lisa Jones, 2011 305 100 95 52 486
1858 ISC Red Stamped Al side plates, pivoting cams, anvil Patroller Supply, 2015 209 104 97 30 295
2637 ISC Rocker Aluminum side plates, spring-loaded pivot arm, fixed anvil, lever lock Bob Thrun Collection, 2017 168 70 115 29 235
Komet Altochut, Version A 632 Komet Altochut, Version A Steel, type 1 lever cam, for specified 5/8 inch (16 mm.) polypropylene or nylon rope. KHS Sales, 1988 505 81 151 63 771
Komet Altochut, Version B 820 Komet Altochut, Version B Steel, type 1 lever cam, stamped eye, for specified 5/8 inch (16 mm.) polypropylene or nylon rope. Len Zandee, 2005 515 81 148 62 746
Komet Stick-Run 728 Komet Stick-Run Steel, type 1 lever cam, for 10.5 mm. kernmantle or 12 mm. laid rope. Inner Mountain Outfitters, 1999 461 81 110 63 561
Kong Back-Up 1716
2650
Kong Back-Up Stamped Al side plates, SS pivoting cams, SS anvil
  • On Rope 1, 2010
  • Bob Thrun Collection, 2017
209 65 95 26 156
Krok Cable Lock 1778 Krok Cable Lock Steel, dual type 1 lever cams, for 8 mm. wire cable Gear4Rocks, 2012 487 130 78 19 193
Krok Drop Model 1 1599 Krok Drop Model 1 Stamped Al side plates, steel pivoting cam, steel anvil Krok (Alex Dniprovsky & Alex Kostromitinov), 2012 157 80 67 29 154
Krok Drop Model 2 221 Krok Drop Model 2 Stamped steel side plates, steel pivoting cam, steel anvil PetrenkoWorld, 2007 225 83 66 29 158
Krok Drop Model 3 1775 Krok Drop Model 3 Aluminum side plates, pivoting steel arms, fixed anvils, double rope Gear4Rocks, 2012 303 80 65 51 264
Krok Drop Model 4 1774 Krok Drop Model 4 Aluminum side plates, pivoting steel arm and Al actuator, fixed anvil, lever lock Gear4Rocks, 2012 191 91 74 30 203
Krok Drop Model 5 1593
1598
Krok Drop Model 5 Stamped steel side plates, steel pivoting cam, cam lock, & latch, steel anvil
  • Gear4Rocks, 2012
  • Krok (Alex Dniprovsky & Alex Kostromitinov), 2012
254 65 80 27 140
Krok Ro 1805 Krok Rol Stamped steel side plates, steel pivoting cam, steel anvil, steel pulley Gear4Rocks, 2013 246 80 67 28 152
Krok Rope Rock Lite 1803 Krok Rope Rock Lite Steel frame , dual Al type 1 lever cams, for rope Gear4Rocks, 2013 307 108 85 23 210
Miller 1200 883 Miller 1200 Bronze 8 /w side arm, manila lanyard /w clip Cal Manky, 2007 715 250 156 49 1912
Miller 8173 Microloc 1648
2634
Miller 8173 Microloc Steel, type 1 lever cam, swing-open shell
  • Dan MacMurray, 2009
  • Bob Thrun Collection, 2017
358 87 75 30 193
Miller 8174, Version A 634 Miller 8174, Version A Steel, dual type 1 lever cams, catch & screw closure, small eye, for 5/8 inch (16 mm.) rope. John E. Weinel, Inc., 1988 803 122 72 89 782
Miller 8174, Version B 2633 Miller 8174, Version B Steel, dual type 1 lever cams, catch & screw closure, small eye, for 5/8 inch (16 mm) rope. Bob Thrun Collection, 2017 801 121 71 81 696
Miller 8174, Version B  889 Miller 8174, Version C Steel, dual type 1 lever cams, catch & screw closure, large eye, for 5/8 inch (16 mm.) or 3.4 inch (19 mm.) rope. Lindsay Rissinger, 2008 898 165 72 83  975
Miller 8174, Version C  890 Miller 8174, Version D Steel, dual type 1 lever cams, screw closure, large eye, for 5/8 inch (16 mm.) or 3.4 inch (19 mm.) rope. Lindsay Rissinger, 2008 725 167 67 81  900
Mio Mechanical 710
2631
Mio Mechanical Steel, type 1 lever activated compression shoe, for 1/2 in synthetic rope.
  • On Rope 1, 1997
  • Bob Thrun Collection, 2017
641 109 136 65 964
Mittlemann KB2 1735 Mittlemann KB2 Steel, dual type 1 lever cams, for 5/8 inch (16 mm) rope. Steven Kaufman, 2011 466 135 75 27 275
Petzl ASAP, Version A 880
2630
Petzl ASAP, Version A Al shell, toothed inertia wheel on spring-loaded lever, plastic guard.
  • Inner Mountain Outfitters, 2007
  • Bob Thrun Collection, 2017
339 136 89 38 461
Petzl ASAP, Version B 1823 Petzl ASAP, Version B Al shell, toothed inertia wheel on spring-loaded lever Inner Mountain Outfitters, 2014 297 110 89 37 359
Petzl ASAP Lock 1835 Petzl ASAP Lock Al shell, toothed inertia wheel /w lock on spring-loaded lever Expé-Spelemat, 2014 404 126 96 47 567
Petzl Macrograb B52 747 Petzl Macrograb B52, Version A Milled Al frame & cam, QR Pin axle, stranded spring-wire On Rope 1, 2000 336 92 114 51 536
Petzl Macrograb B52 2643 Petzl Macrograb B52, Version B Milled aluminum frame & cam, QR Pin axle, stranded springwire Bob Thrun Collection, 2017 340 90 114 53 545
Petzl Micrograb B53 746
2642
Petzl Micrograb B53 Milled Al frame & cam, bolt axle, stranded spring-wire
  • On Rope 1, 2000
  • Bob Thrun Collection, 2017
173 74 58 51 216
1884 Petzl Micrograb B53A Milled aluminum frame & cam, pin axle, spring On Rope 1, 2016 144 81 76 34 212
PMI Arrestor 781
2645
PMI Arrestor, Version A Forged painted frame, hardcoated Al cam, SS bolt axle
  • On Rope 1, 2003
  • Bob Thrun Collection, 2017
209 98 61 49 291
PMI Arrestor 2646 PMI Arrestor, Version B Forged painted frame, hardcoated Al cam, SS axle, spring-loaded axle latch Bob Thrun Collection, 2017 208 98 70 49 335
PMI Grip-Tech Jr. 741
2644
PMI Grip-Tech Jr. Milled Al frame & cam, bolt axle, stranded spring-wire
  • On Rope 1, 2000
  • Bob Thrun Collection, 2017
179 85 62 59 311
PMI Progressor, Version A 782 PMI Progressor, Version A Forged painted frame, hardcoated Al cam, SS axle, spring-loaded axle latch On Rope 1, 2003 208 98 72 49 343
PMI Progressor, Version B 783 PMI Progressor, Version B Forged painted frame, hardcoated Al cam, SS axlebolt. On Rope 1, 2003 209 98 72 46 323
Protecta International AC202/01 Cobra 729 Protecta International AC202/01 Cobra Steel, type 1 lever cam, for 12-16 mm. rope GyC Seguridad S.L., 2000 805 106 120 62 785
Protecta International AC350 Cabloc 730 Protecta International AC350 Cabloc Steel, dual type 1 lever cams, for 8 mm. wire cable GyC Seguridad S.L., 2000 488 100 97 20 195
Protecta International AC400 Viper 784 Protecta International AC400 Viper Steel, spring-loaded pivot arm, fixed anvil Inner Mountain Outfitters, 2003 439 93 110 27 280
1874 Proverti AC080 Aluminum side plates, spring-loaded pivot arm, fixed anvil, lever lock Ondřej Belica, 2015 193 66 120 29 230
1875 Proverti AC081 SS side plates, spring-loaded pivot arm, fixed anvil, lever lock Ondřej Belica, 2015 333 68 111 26 192
RidgeGear 870 RidgeGear Stainless steel, open side, spring-loaded cam & safety gate Lee Pyell, 2007 327 94 86 23 186
Rock Exotica rockGrab RG2 1757 Rock Exotica rockGrab RG2 Milled anodized Al shell, milled hard-anodized Al cam, cable springwire Hanny Piltz, 2012 127 74 61 33 149
Rock Exotica rockGrab RG2-90 1758 Rock Exotica rockGrab RG2-90 Milled anodized Al shell, milled hard-anodized Al cam, 90° eye, cable springwire Hanny Piltz, 2012 137 74 67 33 163
Rock Exotica rockGrab RG4-90 1752 Rock Exotica rockGrab RG4-90 Milled anodized Al shell, milled hard-anodized Al cam, 90° eye, cable springwire Hanny Piltz, 2012 231 99 37 66 242
Rose Mfg. Safe-Hi 692 Rose Mfg. Safe-Hi Steel, compression device, for 3/4 in nylon or manila rope. Theresa Williams/Maury Benamy, 1995 963 300 150 58 2610
Safe-Tec Duck-R 1808
2638
Safe-Tec Duck-R Milled Al shell, spring-loaded type II lever cam, single rope
  • Altius Technical Services, 2013
  • Bob Thrun Collection, 2017
249 97 72 41 291
Safe-Waze 821 Safe-Waze Steel, type 1 lever cam, stamped eye, for specified 5/8 inch (16 mm.) polypropylene or nylon rope. Len Zandee, 2005 601 103 158 70 1139
Sala 1764 Sala Milled hard-anodized Al shell & cam, cable springwire & keeper, pivoting webbing eye, attached web sling & carabiner Tom Furey, 2012 369 85 66 59 330
Sanko Ind. Co. Ltd. Titan 833 Sanko Ind. Co. Ltd. Titan Steel, type 1 lever cam, swing-open cam, for 16 mm. rope. Paul Brian Scurr, 2006 592 104 108 51 568
Singing Rock Rocker 1754 Singing Rock Rocker Aluminum side plates, spring-loaded pivot arm, fixed anvil, lever lock Outdoors Etc., 2012 174 118 68 29 231
Single Rope Technique A5 811 L 736 Single Rope Technique A5 811 L Al, eccentric cam, cam-mounted safety Single Rope Technique, 2000 234 83 76 26 165
Single Rope Technique A5 811 L 2635 Single Rope Technique A5 811 R Aluminum, eccentric cam, cam-mounted safety Bob Thrun Collection, 2017 229 83 76 26 162
SMC Grip 898
2647
SMC Grip Aluminum, type 1 lever cam, milled frame & cam
  • On Rope 1, 2008
  • Bob Thrun Collection, 2017
193 98 73 47 336
Super-Anchor-Safety-4015M 1701 Super-Anchor-Safety-4015M Steel, dual type 1 lever cams, for 5/8 inch (16 mm) rope. Hardware Sales, 2010 443 123 67 25 205
Teufelberger GRIP Rescue 834 Teufelberger GRIP Rescue Steel, swinging front plate, cast pot metal cam & anvil, removable descent handle Dirk-Jan Swier, 2005 576 96 129 39 477
Tractel Stopfor A 1709 Tractel Stopfor A Steel, type 1 lever cam, nylon roller, for 11 mm. rope Magen Deans, 2010 745 106 120 71 904
Tractel Stopfor D (Model WS58) 874 Tractel Stopfor D
(Model WS58)
Steel, type 1 lever cam, rubber roller, for 5/8 in (16 mm.) rope Richard Wolle, 2007 615 105 93 54 527
Tractel Stopfor S 766 Tractel Stopfor S Steel, type 1 lever cam, rubber roller, for 5/8 in (16 mm.) rope Jame Bullard, 2002 475 79 96 65 491
Troll Rocker 742 Troll Rocker Al side plates, spring-loaded pivot arm, fixed anvil Troll, 2000 162 113 65 30 216
Unknown #1 881 Unknown #1 Steel, type 1 lever cam, steel roller, for 16 mm. rope Mike Moser, 2007 801 116 92 64 685
Unknown #2 1763 Unknown #2 Milled aluminum frame & cam, QR pin axle, stranded springwire & keeper Tom Furey, 2012 177 85 65 61 334
Unknown, Version A 1738 Unknown #3, Version A Steel, type 1 lever cam, for 5/8 in (16-mm) rope Brent Fader, 2011 458 122 67 25 206
Unknown, Version B 1737 Unknown #3, Version B Steel, dual type 1 lever cams, double-latched hook attachment, for 5/8 in (16-mm) rope Brent Fader, 2011 550 156 67 35 369
1881 Unknown #4 Steel, dual type 1 lever cams, for 5/8 inch (16 mm) rope. Bob Elron, 2016 450 122 66 25 200
UNR-Rohn Rohn-Loc 661 UNR-Rohn Rohn-Loc Steel, type 1 lever cam. John E. Weinel, Inc., 1990 989 102 167 34 579
Xinda Rocker 1830 Xinda Rocker Aluminum side plates, spring-loaded pivot arm, fixed anvil, lever lock Gold Bucket, 2014 168 114 64 29 214
Yates Rocker 778 Yates Rocker Al side plates, spring-loaded pivot arm, fixed anvil, lever lock Mountain Gear, 2003 163 115 65 29 219
Yoke N601 1736 Yoke N601 Painted Al shell, 4 internal spring-loaded botton-controlled Al rope eyes, pivoting Al attachment eye. KwikSPACE Safety, 2012 357 146 95 35 491

Rope grab Weight Chart