Petzl Micro Traction P53

Usable rope diameter: 8-11mm Efficiency: 91%・Efficiency: 91% Weight: 85g Operating load: 2.5kN x 2 = 5kN (pulley), 2.5kN (self-jamming pulley) Breaking load: 7.5kN x 2 = 15kN (pulley), 4kN (self-jamming pulley) Ultra-light (85 g) and compact self-jamming pulley. It uses sealed ball bearings and is highly efficient (91%). The cam also works on ropes with mud or ice. It can also be used as a simple pulley since the cam can be locked in the open position.