Fiddle block with anodized aluminum cheeks and becket. Works with 704-45 for a 4:1 purchase. Delrin(tm) sheaves feature a single top sheave and two in-line sheaves to spread the load reducing friction and chafe. Swivel head design may be locked in place to avoid twist. Removable becket allows for pre-spliced lines to be used. Upper Sheave Dia. 2 3/8" (60mm), Lower sheaves diameter 1-13/16" (46mm)Sheave Dia. 2 3/8" (60mm), Thickness 1 3/32" (28mm), Width 3 31/32" (101mm), Length 8 25/32" (223mm), SWL 2250 lbs. (1020kg), Weight 1lb. 7oz. (652g),