1/2in Dr. 21 mm Cr-Mo Impact Socket

Genius Tools Impact Socket 21mm 1/2 Inch Drive CR-Mo Steel Heavy Duty - 444021 Impact Socket This 1/2in drive 21mm impact socket is built for high-torque fastening where strength, fit, and long-term durability matter. The 40mm (1.57in) overall length keeps the profile compact for controlled access while maintaining the robustness expected from an impact-rated socket. Constructed from Chromium Molybdenum Alloy Steel (CR-Mo), it is engineered for high strength and durability with anti-corrosive properties. A matte black oxide finish and oil-quenched heat treatment help deliver a tough exterior and a strong inner core for sustained professional use. Key Benefits 1/2in drive, 21mm size supports common impact tool fastening applications. 40mm overall length fits compactly while maintaining an impact-rated profile. Chromium Molybdenum Alloy Steel construction delivers strength and long-term durability. Anti-corrosive material properties help resist harsh shop and jobsite conditions. Oil-quenched heat treatment improves exterior toughness and inner core strength. Matte black oxide coating provides a durable finish for demanding professional use. Permanently stamped size markings speed identification and improve tool organization. SKU: 444021. It is a dependable choice for repeated heavy use where consistent performance and easy size identification are essential.