Clam cleat from Sea-Dog is manufactured from marine-grade nylon for ultimate durability in marine environments. Cleat is ideal for most applications where high loads or rope surges are not likely to be encountered. Corrosion-resistant design. For use with 1/8" - 1/4" rope. Uses #8 FH fasteners. 3-1/4"L x 11/16"W. 2-5/8" in between mounting holes.