The 5/8” Gag Closed allows one 5/8” (16mm) rod to be joined and positioned anywhere in 360 degrees with either a 5/8” (16mm) rod or a 3/8” (10mm) rod. The 5/8” Gag Closed works perfectly for adding reinforcement components to a rigging structure. The option to convert from 5/8” (16mm) rod to 3/8” (10mm) rod gives you added flexibility for your rigging needs.