With super-strong carbon fiber composite cams, the popular Ronstan "C-Cleats” are designed for easy cleating and releasing of control lines under every application and load condition. The unique tooth profile and cam geometry are designed to grip without damaging the line. Unlike ball bearings, the Teflon® impregnated, self-lubricating slotted bushing bearings do not deform - providing smooth, consistent performance - even under high loads.