Stronger version of the Hexaratchet II+2 with 8:1 holding power. Beefier posts and wraparound straps handle higher working loads.Sheave: Teflon-impregnated Hardkote anodized aluminumBearings: DelrinSheave Size: 3" (76mm)Line Diameter: 9/16" max.Cheek Material/Finish: Plastic with wrap-around stainless strapsCleat: 1556 and 1566: 280 Cam-MaticRatchet: 8 to 1 holding power, slide off/on switch