Head swivels freely, or is easily fixed with locking feature. Injection molded Delrin sheaves contain high amounts of UV inhibiting additives to protect the sheave from damaging UV rays. Investment cast, three-way stainless head, forged ""D"" shackles, and bolted construction (easy maintenance) all score high on strength and durability. Sheave Dia. 2 3/8", Thickness 1 3/32", Width 2 3/8", Length 5 5/8", SWL 2750 lbs, Weight 12oz, Max Line 9/16".