Fiddle block with anodized aluminum cheeks, ball bearing sheaves and becket. Works with 706-45 for a 4:1 purchase. Delrin(tm) ball bearing sheaves feature a single top sheave and two in-line sheaves to spread the load reducing friction and chafe. Swivel head design may be locked in place to avoid twist. Removable becket allows for pre-spliced lines to be used. Length 9 7/16"(240mm) Width 3 31/32"(101mm), Thickness 1 3/32" (28mm), Weight 1 lb 9oz (709g), Max Line 9/16" (14mm)