08-77 Screw in deck block. Spring mounted 8 Series Stainless Steel block. SS Cheeks, Lexan(tm) sheave, Nomex(tm)/Teflon(tm) bearing, Overall height off of deck 4-5/8" (119mm), Width 2-3/8" (60mm), Thickness 1-3/32" (28mm), Weight 21 ounces (653gm). SWL 2750 lbs. Fits 78-77 Universal Deck mount only.