; Allows for quick change of claws to fit various brands of rocker arms; Built-in 400-lb. reading scale; Billet aluminum with body pocket to fit taller adjuster nuts used on stud girdles; Use with Moroso Stud Mount Valve Spring Compressors No. 62373 or No. 62370 for the most accurate method of maintaining the valvetrain on a fully assembled engine; Kits include No. 62403 straight claw; Additional claws sold separately