Side entry Clamcleats are designed to be mounted with the open side facing outboard. The line should lead into the cleat from the inboard side or straight ahead, not from the outboard side. These high performance cleats are made from aluminum, which handles high loads and heat generated by rapidly moving lines much better than plastic or fiber-reinforced plastic cleats. Hard anodized Clamcleats (AN models) offer superior resistance to seawater corrosion. Available in large and small sizes Silver-coated aluminum or black hard coat black anodized aluminum C to C distance for mounting screws: 2-5/8" Mk1; 1-1/16" Mk2