Expanding spring-loaded tube chocks with lock-off screw collar is effective in offwidth cracks. Depress the button to allow the tube to expand to the width of a crack and then tighten the collar to lock the unit into place. Big Bros are relatively light, compact, and stable compared to spring-loaded camming devices.
- Offset ends allow for secure angled placement.
- Holes at one end of the tube need to be slung.
- Made of aluminum.
|Ideal for||Trad and aid climbing|
The maximum force generated by a fall the equipment can withstand. The range includes all sizes.
|Three sigma tested||No|