Single block with anodized aluminum cheeks and becket. Becket may be easily removed for use with pre-spliced line. Delrin(tm) sheave ensures smooth operation and high safe working load. Swivel head may be locked in place to avoid twist. Sheave Dia. 2 (51mm), Thickness 1-15/16"(49mm), Width 2 1/8" (54mm), Length 5 17/32" (140mm), SWL 1750 lbs. (795kg), Weight 5.7oz (162g), Max Line 7/16" (11mm), Max Line 7/16" (11mm)