Ronstan's Cam Cleat with Bullseye Swivel Base is commonly used on dinghies and catamarans to lead, adjust, and cleat halyards and lines of up to 12/32 in (12mm) in diameter. The 360ﾰ-rotating base combined with the medium T-cleat permit easy cleating and releasing from any angle. Ronstan manufactures the cleating plates out of a heavy gauge allow for stiffness and minimum distortion under load. The dead eye has a stainless steel liner for low friction and long life. The cleating plates/arms are heavy gauge alloy for stiffness and minimum distortion under load. The other fittings, including the deadeye, on this item are of grade 316 stainless steel.