504-60 Halyard/Control block. Delrin(tm) sheave ensures smooth operation and high strength. Anodized aluminum cheek and stainless steel base provide a solid platform. Block is mounted to bisect load angle for maximum strength. Sheave Dia. 2", (51 mm), Max Line 7/16", (11 mm), Jaw Opening 2-9/32", (58mm), Pin. Dia. 1-5/16", (49 mm), Length 2-9/16", (65 mm), Width 5/8", (16 mm), T (4), #10 RH (5 mm), C/C Length 1-21/32", (42 mm), C/C Across 1-13/32", (35 mm), SWL 1750 lbs. (795 kg)