CMI Micro Pulley Dual Attachment Points, 1/2″ Capacity & Moveable Cheek Plates Purple . This pulley often referred to as the Mickey Mouse pulley because of the shape created by the two attachment point, is the best friend of many technical climbers. Features and specifications: Aluminum Cheek Plates and Sheave. Moveable check plates Double attachment points Capacity: 1/2″ Diameter Rope Tensile Strength: 7000 lbs. Sheave Diameter: 1.25″ Pulley Height: 2.75″ Manufacture: CMI