The Edelrid Spoc is an ultra-light pulley with backstop. Designed for lifting loads, crevasse rescue operations, or as an emergency ascender.
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 
Ball bearing pulleys for high efficiency (92 %)
Cams for optimal grip on iced or muddy ropes
 
Minimum breaking strength: 15 kN
Certification: EN 12278 
Certification: EN 567 
Material: Aluminium, Steel, Polyamide