1/2in Dr. 21mm Impact Socket

Genius Tools Impact Socket 21mm 1/2 Inch Drive Heavy-Duty Chrome Molybdenum Steel - 413821 Impact Socket This 21mm, 6-point impact socket is built for high-torque fastening with a 1/2in drive interface. The compact 38mm (1.5in) overall length helps maintain access where clearance is limited, while the stamped sizing supports fast identification during tool changes. Designed for professional technicians and demanding shop work, it combines a heat-treated build with a matte black oxide coating for a tough exterior and strong inner core. Key Benefits 21mm 6-point profile helps reduce fastener rounding under impact loads. 1/2in drive size fits common impact wrenches and driver setups. 38mm overall length supports access in tighter working spaces. Chromium-vanadium steel alloy provides strength with anti-corrosive properties. Oil-quenched heat treatment improves durability for long-term professional use. Matte black oxide coating adds wear resistance and a tough exterior finish. Stamped size markings stay readable for quick, permanent identification. SKU 413821 is built to stay organized, stand up to repeated impact use, and deliver consistent fit on 21mm fasteners. With ANSI-compliant performance, durable construction details, and clear size marking, it supports reliable service life in daily professional tool rotation.