Triple Block with Stainless Steel Cheeks, Delrin(tm) Sheaves, Adjustable Cam and Becket. Adjustable cam bracket allows for correct cam cleat angle. Works with 505-90 for a 6:1 Purchase. Fast entry cam cleat ensures smooth line engagement. Length 5-17/32" (140mm), Width 4"(101mm), Thickness 2-5/16" (59mm), Weight 1lb 3 oz (482g). Safe Working load 1750 lbs (795kg)