Ultra-light pulley with backstop. Designed for lifting loads, crevasse rescue operations, or as an emergency ascender. Features The backstop can be fixed in the open position in order to use the device as a simple pulley Pulley diameter: 20 mm Suitable for ropes with a diameter of 7.0 to 11.0 mm as well as for the EDELRID RAP LINE Ball bearing pulleys for high efficiency (92 %) Cams for optimal grip on iced or muddy ropes