Internal halyard stationary truck is made from cast aluminum with a cast nylon sheave on a 1/4 in. aluminum axle. This matte finish truck is designed to slip over the top of the flagpole and be secured by three (3) 1/4 in. stainless steel set screws. Top of the assembly is tapped 1/2 in. to accept an ornament/finial. Maximum recommended halyard diameter is 5/16 in.