Assisted-braking resistor to increase rope friction when there is a large weight difference between belayer and lead climber. In the event of a fall, the OHM increases the amount of rope friction so that a lighter belayer can hold a heavier lead climber without difficulty. 
Features:
- Belayer requires significantly less hand braking force to arrest a fall
 
- Lowering a heavier climber is much easier to control
 
- OHM is attached at the first bolt in the safety chain
 
- Should a lead climber fall at the first bolt, the OHM significantly reduces the risk of a possible ground fall
 
-  Rope handling when belaying a lead climber not affected (no additional friction when paying out rope)
 
- Recommended weight difference (lead climber & belayer): 10 - 40 kg  
 
- Minimum weight belayer: 40 kg
 
- For single ropes from 8.9 - 11 mm
 
Suitable ropes Ø in mm: single ropes 8.9 - 11 mm
Weight supplement: manufacturer's specs