Perko Chrome Cleat With Black Plastic Open BasePerko open base cleat constructed of chrome-plated zinc alloy with a black polymer base. Available in two sizes - 4-1/2" cleats are sold as a pair and 6" cleats are sold individually.Specifications: 4-1/2" Cleat (Sold as a pair); Max Rope Size: 3/8"; Screw Size: 10; 6" Cleat (Sold individually); Max Rope Size: 1/2"; Screw Size: 1/4;