EFFORTLESS GLIDE: Easy to install and easy to use. The FIXE pulley has a sheave mounted on self-lubricating bushings for easy rope glide during hauling or ascending. SIMPLE INSTALLATION: Fixed side plates prevent fumbling, allowing quick installation and coupling with a rope clamp. LIGHTWEIGHT: Weighing just 3.2 oz, this pulley is easy to throw onto your harness and forget about until you need it. COMPATIBILITY: Works with ropes 7-13 mm in diameter. Details: The FIXE pulley has a working load of 5 kN (2.5 kN on one rope strand) and a breaking strength of 23 kN. It's compatible with ropes 7 to 13 mm in diameter.