Our SHOCKWAVE Impact Duty Socket Adapter provides you with tool versatility. These adapters convert drive tools to be used with ??, 3/8? and ?? drive tools and sockets. Milwaukee engineered these adapters 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 adapter attachment and removal. All MILWAUKEE SHOCKWAVE Impact Duty Socket Adapters meet ASME industry standards.