The Sea-Dog Zig Zag cleat is easy to use, since no knots are required. Just weave line around the cleat arms for a secure hold. Made for heavy duty use, the Zig Zag accepts line up to 3/8", and is ideal for use with utility lines, fender lines, and trailer covers. Constructed of injection-molded nylon. Use 1/4" flat head screws for mounting (not included).