Swivel head may be locked in place to avoid twists or allowed to swivel. Delrin Sheave, Aluminum Cheeks, combine with 5 series adapters for a variety of leads. Sheave Dia. 2", Thickness 1 21/32", W 2 1/8", L 5 1/16", SWL 1750 lbs., Weight 8.3oz., Max Line 7/16".