10 Series Fiddle Block with Stainless Steel cheeks and becket. Works with 10-45 for a 4:1 purchase. Delrin(tm) sheaves run on Nomex(tm)/Teflon(tm) bearings for low-friction and high safe working loads. Unique design features a single top sheave and two in-line sheaves to spread the load reducing friction and chafe. Stainless Steel D shackle run on a swivel head that may be locked in plate to avoid line twist. Removable becket allows for use of pre-spliced line. Bolted construction allows for easy maintainence. Upper Sheave Dia. 3 1/4" (83mm), Lower sheaves dia. 2-3/8" (60mm), Thickness 1 7/32" (31mm), Width 4 13/16" (122mm), Length 11 1/4" (286mm), SWL 3750 lbs (1750kg), Weight 3lbs 4oz (1.47kg), Max Line 5/8" (16mm)