Ultra-light and ultra-compact Pulley with backstop (50% space and weight savings compared to the MINI TRAXION). The encapsulated ball bearing guarantees excellent efficiency (91%). The backstop can be locked in the open position to use the device as a simple pulley. Blocks even on dirty or icy ropes. For use on ropes from 8 to 11 mm in diameter. The installation on the rope is shown on the inside of the pulley. Designed for crevasse rescue, pulley blocks, self rescue and as a rope clamp for emergencies.