The CTA Tools VibroShock is designed to remove frozen or rusted screws, nuts, bolts or plugs without damage. VibroShock generates axial vibration with controlled torque to release the welding between male and female threads. It locks onto an air hammer on one end with a 3/8” square drive on the other. The kit includes seven 3/8” square drive metric sockets. Socket sizes include 8mm, 9mm, 10mm, 11mm, 12mm, 13mm and 14mm.