Our SHOCKWAVE Impact Duty? socket adapter provides you with tool versatility. These adapters convert drive tools to be used with 1/4 in, 3/8 in and 1/2 in 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.