1/2 Sq. Dr. Stud Bolt Setter 6 Piece Set, 1/4 - 1/21 2 DRIVE SAE, STUD SETTER SET The Stud Bolt Setter is a special socket for installing a stud bolt. The bolt contact with a steel ball to prevent the bolt from sticking onto the socket. After installing the bolt, turn anti clockwise to remove the socket. Input Drive Size: 1 2" Drive Shape: Square Length: 200mm Rail Type: Stud Bolt Setter Set Output Sizes: 1 4(28), 5 16(18) ,5 16(24), 3 8(16), 7 16(14), 1 2(13) Includes: SKU DESCRIPTION LENGTH 4103A 1