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)