"K" cam maxi cleat "K" Cams are manufactured from a composite Kevlar/Zytal material. Accept lines up to 14mm diameter. The use of this exotic Kevlar/Zytal composite offers performance advantages over carbon fibre and conventional glass reinforced resins. "K" Cams are very strong, lightweight, have excellent wear resistance and a cam profile that makes them extremely efficient. For line entry/release even under load.