The MILWAUKEE SHOCKWAVE Impact Duty 1/2" Drive to 3/8" Drive Socket Reducer provides tool versatility and durability in high torque applications. This adapter converts 1/2" drive tools to be used with 3/8" drive impact sockets. Milwaukee engineered these reducers with forged steel for durability in high torque applications. The laser-etched size markings allow for easy size identification. The dual-hole design and ring groove make for easy reducer attachment and removal. All SHOCKWAVE Impact Duty Socket Reducers meet ASME industry standards.