1/2” 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)