Ronstan's C Cleat (Carbon Fibre Cam Cleat) is corrosion free and designed for easy cleating and releasing of medium diameter control lines, jib sheets or mainsheets. It provides the holding power you will need without chewing up your line. The cams are made out of rigid, lightweight carbon fibre. A multi-coil spring recessed in the upper part of the cam generates near constant torque ensuring secure cleating and low line entry and exit efforts. This large cleat is Ronstan's large cleat and works well with 1/4 in (6mm) to 5/8 in (16mm) line diameter. Ronstan's hole spacing matches Harken cam cleat hole spacing. This large Carbo Cam Cleat comes with blue caps. Please specify color and size when ordering.