The compact and only 60g light pulley features a backstop that can be fixed in open position. Then, spoc can be used as a standard pulley.
Its ball bearing pulleys feature very high efficiency of 92 %. Spoc is suitable for rope diameters from 7,0 to 11,0 mm.
It's the ideal compagnion for crevasse rescue, lifting loads and is also useable as an emergency ascender.