Single ball bearing block with Anodized Aluminum cheeks and delrin(tm) ball bearing sheave. Delrin(tm) ball bearing sheave ensures low-friction and high safe working load. Swivel head may be locked in place to eliminate line twist. Removable becket allows for the use of pre-spliced line. Sheave Dia. 2 3/8" (60mm), Thickness 1 3/32" (28mm), Width 2 1/2" (64mm), Length 6 9/32" (160mm), SWL 1700 lbs. (771kg), Weight 9oz (255g), Max Line 1/2" (13mm)