The swivel Omni pulleys are machined from a solid block of high-strength aluminum and engineered to withstand over 8,000 lbs (36 kN) end to end. Configured as a set-of-fours (double blocks), they give greater versatility in a personal mechanical advantage (PMA) system for rescue and general rigging. Turn the set one way for a 5:1 mechanical advantage; turn it around for a 4:1 with change of direction. The progress-capture ratchet prusik can attach at either end (orange to orange, or blue to blue). One quick pin is included with each set; additional pins may be purchased. Made in the U.S.A.
