Halyard/Control block. Delrin(tm) sheave ensures smooth operation and high strength. Anodized aluminum cheeks and Stainless steel base provide solid platform. Block is mounted to bisect load angle for maximum tensile strength. Sheave Dia. 2-3/8, (60 mm), Max Wire 5/8 (16 mm), Jaw Opening 2-9/16, (65 mm), Pin. Dia. 2-11/32, (59 mm), Length 3-3/16, (81 mm), Width 15/16, (24 mm), T (4), 1/4, RH (6 mm), C/C Length 1-15/16, (49 mm), C/C Across 1-3/4, (44 mm), SWL 2250 lbs. (1020 kg)