Nut Grip Hex with grip ring to hold nuts/bolts in place. Input Drive Size: 3/8" Drive Shape: Square Socket Length: 62mm Type: Hex Bit Socket Set on Rail Includes: 3015M Hex Bit Sockets: 3. 4, 5, 6, 7, 8, 10, 12 Rail (200mm long)   Dimension: 3/8 Sq. Dr. Bit Grip Ring Hex 32mm Long Bit Socket Set - 8 pieces