CMI set the standard for lightweight, compact, and functional rescue pulleys almost 15 years ago. They are now used in many arborist situations whether anchoring a climbing line or redirecting a static line. These pulleys feature stainless steel axles and the aluminum sheaves are supported by sintered bronze bushings. The lightweight aluminum cheeks feature the "wide skirt" sideplate design for maximum rope protection. Sideplates swing open to allow placement anywhere on the line. Accepts ropes up to 5/8" in diameter.