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Chest Boxes

Chest boxes are key components of two important climbing systems. Single channel boxes are used for various rope-walking systems (although a few of us still prefer the old shoulder Gibbs). Double channel boxes are used for the Mitchell System and its extension, the Cuddington 3-Phase. I use the Cuddington for almost all of my vertical caving. The Cuddington is extremely versatile and not terribly sensitive to sling lengths. It requires more time to learn well than some other systems, but taking the time to learn it well is well worth the effort. For many years, I used Fritzke's Alpine Box and was quite pleased with it. Previously I used a modified Gossett Block (specifically, Darrell Tomer's Custom Gossett #12) which also worked well for me, but the Alpine Box allows faster mode changes and rigging. The double-rope Flash Bar deserved very serious consideration as well, it was quite light, but its strength was an issue (even though a chest box should not be rigged as life support equipment). Today I prefer the double rope PMI box, which is exceptionally well made, very smooth, easy to use, and surprisingly light.

In the ID column, I used a red background for single channel rollers and a green background for double channel rollers.

[ Before you make your own… ]

Gallery

Image ID Device Description Acquired Weight Height Width Thickness Std. volume
Bassett Metal Studios 704
2608
Bassett Metal Studios Solid plate, single roller, side entry, button-activated gate
  • Inner Mountain Outfitters, 1997
  • Bob Thrun Collection, 2017
273 70 190 49 652
BlueWater 632
1797
1831
2603
BlueWater Solid plate, extruded channel, two rope, 1 straight roller, bolt closure
  • 1970s
  • Barbara Anne Am Ende, 2012
  • David Jones, 2017
  • Bob Thrun Collection, 2017
330 76 131 74 737
British 824 British Solid plate, bent channel, two rope, 2 cylindrical rollers, bolt closure Brian Trevelyan, 2005 283 77 128 69 680
Cam Box 739 Cam Box Solid Plate, 2 rope grooves, 1 /w Jumar cam, hinged front, screw-knob closure Bob Danielson, 2000 504 89 172 35 536
Dave Lester 1706 Dave Lester Nylon box containing Simmons roller and Karst Works Harness Dave Lester, 1920 - 67 279 65 1206
Dave Stoltz 1663 Dave Stoltz Milled Al plate /w 2 Simmons Rollers Howie's Harnesses 389 51 227 62 720
Flash Bar, double rope 722
2712
Flash Bar, double rope Rod frame /w roll pins, double roller, side entry, pull-knob activated gates
  • Inner Mountain Outfitters, 1999
  • Bill Liebman, 2017
146 51 215 54 592
Flash Bar, single rope 718 Flash Bar, single rope Rod frame /w roll pins, single roller, side entry, pull-knob activated gate Inner Mountain Outfitters, 1999 118 51 215 54 592
Fritzke Alpine Box 631
2605
Fritzke Alpine Box Solid plate, two rollers, swing gate with latch
  • Mike Fritzke, 1992
  • Bob Thrun Collection, 2017
293 51 203 42 435
Gossett, Version A 633
2655
Gossett Block, Version A Extruded frame, two rope, 4 straight rollers
  • 1978
  • Bob Thrun Collection, 2017
328 64 84 41 220
Gossett, Version B 1611 Gossett Block, Version B Extruded frame, two rope, 4 straight rollers
  • 1978
  • Gene Clinger, 2008
368 64 85 41 223
Gossett, Version C

1784
1833
2684

Gossett Block, Version C Extruded frame, two rope, 4 shaped rollers
  • Charlotte Phillips, 2012
  • James Thompson, 2014
  • Bob & Bob, 2017
370 65 86 41 228
Gossett, Version D 634
2601
Gossett Block, Version D Extruded frame, two rope, 4 shaped rollers
  • Speleoshoppe, 1982
  • Bob Thrun Collection, 2017
367 64 84 41 220
Gossett, Version E 2602 Gossett Block, Version E Extruded frame, two rope, 2 roller pairs each on QR pin. Bob Thrun Collection, 2017 312 85 64 40 217
J. E. Weinel Inc. 648 J. E. Weinel Inc. Milled solid plate, screw-mounted Simmons Roller John E. Weinel, Inc., 1991 288 86 102 61 535
Joe Flansburg 1806 Joe Flansburg Cut aluminum plate, bolted angles, nylon roller on QR pin, noncommercial Thomas Flansburg, 2013 465 178 87 52 799
John Blum, Version A 635
1897
John Blum, Version A Cast frame, 2 rope, nylon rollers on common shaft, swing-open
  • Inner Mountain Outfitters, 1988
  • Bob Thrun Collection, 2017
256 77 127 44 430
1879
1898
2710
John Blum, Version B Cast frame, 2 rope, nylon rollers on common shaft, swing-open
  • CarolJo Rushin-Elron, 2020
  • Bob Thrun Collection, 2017
  • Bill Liebman, 2017
254 76 125 44 415
John Blum, Version C 636 John Blum, Version C Cast frame, 2 rope, brass rollers on common shaft, swing-open Bob & Bob, 1993 327 64 175 43 482
John Blum, Version D 1899
2711
John Blum, Version D Cast frame, painted, 2 rope, brass rollers on common shaft, swing-open
  • Bob Thrun Collection, 2017
  • Bill Liebman, 2017
332 177 66 44 507
Landau, Version A 637 Landau, Version A Milled frame, single pulley, small sides, QR pin for side pivot Robert Landau, 1985 99 57 57 57 185
Landau, Version B 638 Landau, Version B Milled frame, single pulley, large sides, QR pin for side pivot Robert Landau, 1985 108 63 57 60 215
Ledbetter Double 639 Ledbetter Double Solid SS frame, dual rope, nylon pulleys on single QR pin Inner Mountain Outfitters, 1991 404 77 100 57 439
Ledbetter Single 2604 Ledbetter Single Solid SS frame, single rope, nylon pulley on QR pin, bungie pullie connected with small maillon Bob Thrun Collection, 2017 325 100 76 57 433
Mainstruck (prototype) 669 Mainstruck (prototype) Carbon fiber frame, two rope, rollers on QR pins Geary Schindel, on loan, 1993 272 76 151 60 689
Neil Box, Version A 640 Neil Box, Version A Extruded frame, two rope, 2 rollers, swinging side gates Speleoshoppe, 1979 248 63 77 69 335
Neil Box, Version B 823
2600
Neil Box, Version B Extruded Al frame, soft anodized, two rope, 2 rollers, swinging side gates, 3 harness slots
  • Brian Trevelyan, 2005
  • Bob Thrun Collection, 2017
208 76 76 61 354
On Rope 1, Lightweight Single 694 On Rope 1, Lightweight Single Skeletonized plate, captured standard Simmons Roller On Rope 1, 1996 195 76 201 54 825
On Rope 1, Lightweight Double, Version A 706 On Rope 1, Lightweight Double, Version A Skeletonized plate, dual captured standard Simmons Rollers On Rope 1, 1997 315 76 200 54 821
On Rope 1, Lightweight Double, Version B 1664
2652
On Rope 1, Lightweight Double (a.k.a. Stealth II), Version B Skeletonized plate, dual captured standard Simmons Rollers
  • On Rope 1, 2009
  • Bob Thrun Collection, 2017
326 76 203 55 841
On Rope 1, Lightweight Double, Version B 2713 On Rope 1, Lightweight Double (a.k.a. Stealth II), Version C
Skeletonized plate, dual captured standard Simmons Rollers (quality control reject: mismatched rollers & shells) Bill Liebman, 2017 317 76 203 55 857
On Rope 1, Standard Double 693 On Rope 1, Standard Double Solid plate, dual captured Simmons Rollers, sewn shoulder strap buckles On Rope 1, 1996 465 77 200 54 832
Paul Stovall 1705 Paul Stovall Solid plate, two rollers, swing gate with latch John Woods, 2010 334 57 203 39 456
PMI, single rope 818
2653(2)
PMI, single rope
Milled plate, milled post, single roller, wire safety
  • PMI, 2005
  • (2) Bob Thrun Collection, 2017
301 75 197 54 792
PMI, double rope 819
1708
2607
PMI, double rope
Milled plate, milled post, double roller, wire safety
  • PMI, 2005
  • Cargo Largo 2011
  • Bob Thrun Collection, 2017
353 75 197 54 792
R. C. Schroeder, Version A 641
2609
R. C. Schroeder, Version A SS sheet metal frame, single roller, button-activated hinged opening
  • R. C. Schroeder, 1992
  • Bob Thrun Collection, 2017
135 37 85 48 151
R. C. Schroeder, Version B 2610 R. C. Schroeder, Version B SS sheet metal frame, single roller, button-activated hinged opening Bob Thrun Collection, 2017 211 98 63 48 297
R. C. Schroeder, Version B 2611 R. C. Schroeder, Version C SS sheet metal frame, single roller, button-activated hinged opening Bob Thrun Collection, 2017 485 255 63 74 1189
R. C. Schroeder, Version C 684 R. C. Schroeder, Version D Skeletonized plate, single roller, side entry, button activated gate R. C. Schroeder, 1995 167 38 240 51 465
R. C. Schroeder, Version D 770
2651
R. C. Schroeder, Version E Solid plate, single roller, side entry, button-activated gate
  • R. C. Schroeder, 2002
  • Bob Thrun Collection, 2017
191 45 177 49 388
R. C. Schroeder, Version E 789  R. C. Schroeder, Version F Solid plate, two rollers, side entry, button-activated gate R. C. Schroeder, 2003 389 53 215 50 564
Russian, Alpine Box Copy 651 Russian, Alpine Box Copy Solid plate, two rollers, swing gate with latch 1994 287 55 210 53 612
Russian, Simmons Roller Copy 649 Russian, Simmons Roller Copy Pressed U frame, straight roller mounted on QR pin 1994 114 48 63 63 191
Russian, Double Simmons Roller Copy 650 Russian, Double Simmons Roller Copy Solid plate, two rope, screw-mounted U frames, pulleys on QR pins 1994 412 55 210 69 797
Simmons Compact Double 642
2617
Simmons Compact Double Solid plate, dual screw-mounted asymmetrical Simmons Rollers
  • Ron Simmons
  • Bob Thrun Collection, 2017
244 51 72 53 195
Simmons Double 643
2616
Simmons Double Solid plate, dual screw-mounted Simmons Rollers
  • Inner Mountain Outfitters, 1991
  • Bob Thrun Collection, 2017
326 51 113 64 369
Simmons Racing Single 644
2618
Simmons Racing Single Solid plate, screw-mounted Simmons roller
  • Ron Simmons
  • Bob Thrun Collection, 2017
314 51 241 61 750
Simmons Racing Double 2619 Simmons Racing Double Solid plate, two screw-mounted Simmons rollers Bob Thrun Collection, 2017 428 241 51 64 778
Simmons Single 645
646
1672
2614
2615
Simmons Single, Version A Pressed U frame, straight roller mounted on QR pin
  • Ron Simmons, 1981
  • Geary Schindel, 1992
  • Howie's Harnesses, 2009
  • (2) Bob Thrun Collection, 2017
82 57 51 47 137
Simmons Single 2715 Simmons Single, Version B Pressed U frame, U-groove roller mounted on QR pin Bill Liebman, 2017 94 51 57 55 158
Simmons Single Custom Cave Gear 2613 Simmons Single Custom Cave Gear Pressed U frame, straight roller mounted on QR pin Bob Thrun Collection, 2017 82 57 51 47 136
Simmons Single Prototype 2612 Simmons Single Prototype Gibbs ascender frame, straight roller mounted on QR pin Bob Thrun Collection, 2017 89 73 57 49 200
Speleoshoppe, Version A 686 Speleoshoppe, Version A Solid plate, extruded channel, two rope, 2 straight rollers, bolt closure Inner mountain Outfitters, 1995 305 76 126 73 699
Speleoshoppe, Version B 1820 Speleoshoppe, Version B Solid plate, extruded channel, two rope, 2 rollers, bolt closure John Woods, 2014 309 76 127 74 720
Storrick 652 Storrick Solid plate, bent channel, two rope, 1 shaped roller, bolt closure, noncommercial Robert W. Storrick 229 64 108 80 553
Tomer Custom Gossett #10 653 Tomer Custom Gossett #10 Extruded frame, two rope, 2 shaped rollers (modified #633) Darrel Tomer, 1984 178 32 84 41 110
Tomer Custom Gossett #11 654 Tomer Custom Gossett #11 Extruded frame, two cable, one shaft, disassembles to rig (modified #633) Darrel Tomer, 1984 173 33 59 41 80
Tomer Custom Gossett #12 655 Tomer Custom Gossett #12 Extruded frame, two rope, 2 shaped rollers (skeletonized #634) Darrel Tomer, 1984 166 66 86 41 233
Tomer Custom Gossett #13 656 Tomer Custom Gossett #13 Extruded frame, one rope, roller on screw knob (modified #634) Darrel Tomer, 1984 72 31 39 41 50
Tomer Custom Gossett #14 657 Tomer Custom Gossett #14 Extruded frame, one rope, roller & cam on screw knobs (modified #634) Darrel Tomer, 1984 231 66 58 41 157
Tomer Custom Gossett #15 658 Tomer Custom Gossett #15 Extruded frame, one rope, roller & cam on QR pins (modified #634) Darrel Tomer, 1984 215 65 58 42 158
Vertical Supply 647 Vertical Supply Solid plate, captured Simmons Roller, bungie pulley on accessory cord Vertical Supply, 1993 268 77 202 54 840

Chest box Weight Chart