SafeWaze FS060 Forged Swivel Rebar Chain Assembly, 26" Adjustable. The SafeWaze FS060 Rebar Chain Assembly is a complete positioning assembly for use on concrete forms. It comes ready to use with two double locking snap hooks, a Symons Form rebar hook, and chain. Forged steel swivel rebar hook with 2. 55" opening; Forged steel locking snap hooks with 0. 83" opening; 5/0 Twist link chain.