The Performance W89414 4-piece Metric Stud Puller Set is constructed quickly removes right or left threaded studs with no damage to threads. Features: * Turn with 3/8-inch or 1/2-inch square drive tool or 13/16-inch wrench * For hand use only * Chrome vanadium steel construction * includes 3/8-inch drive sizes: 6mm and 8mm * Includes 1/2-inch drive sizes: 10mm and 12mm What"s In The Box: * Performance W89414 4-piece Metric Stud Puller Set