Triple block with Stainless Steel cheeks. Works with 505-93 for a powerful 6:1 purchase. Swivel head may be locked in place with the adjustment of an set screw. Delrin(tm) sheaves ensure smooth operation and high safe working load. Sheave Dia. 2" (51mm), Thickness 2 3/8" (61mm), Width 2 1/8" (54mm), Length 4 13/32" (112mm), SWL 1750 lbs. (795kg), Weight 13.5oz. (383g), Max Line 7/16" (11mm)