Make stud removal easier with our professional rocker arm stud remover tool. With ball bearing action and fittings for 5/16" and 3/8" this tool is a must have for all engine builders.Proform Engine Cylinder Head Stud Removal Tool 66484Specifications: Feature/Benefit Make stud removal easier with our professional rocker arm stud remover tool. Tool Type Push Rod Tools Category Rocker Stud Puller Description_ABR Stud Puller Description_SHO Rocker Stud Puller Description_INV Rocker Stud Puller Description_INV Professional Grade Description_DEF Engine Cylinder Head Stud Removal Tool Description_ASC Engine Rocker Arm Stud Puller Description_ASC Professional Grade Model Description_ASC For 5/16 and 3/8 Studs Description_LAB Engine Rocker Arm Stud Puller Description_LAB Professional Grade Model Description_LAB For 5/16 and 3/8 Studs Description_DES Engine Rocker Arm Stud Puller Description_DES Professional Grade Model Description_DES For 5/16 and 3/8 Studs Description_EXT Engine Rocker Arm Stud Puller Kit Description_EXT Professional Grade Model Description_EXT Designed for use with 5/16 Inch and 3/8 Inch Rocker Arm Studs Description_EXT Features Ball Bearing Action and Includes Fittings for 5/16 Inch and 3/8 Inch Studs Description_EXT Sold as One Complete Kit Description_MKT Make stud removal easier with our professional rocker arm stud remover tool. With ball bearing action and fittings for 5/16" and 3/8" this tool is a must have for all engine builders.