3/8in Dr. 21mm Cr.-Mo Impact Socket

Genius Tools Impact Socket 21mm 3/8 Inch Drive CR-Mo Steel Durable Heavy-Duty - 343221 Impact Socket SKU: 343221. This 3/8in drive 21mm impact socket is designed for professional technicians who need consistent fit, dependable strength, and long service life in heavy-use environments. Built from Chromium Molybdenum Alloy Steel, it combines high strength with anti-corrosive properties. A heat-treated construction and matte black oxide coating support durability, while permanently stamped size markings improve tool organization and speed on the job. Key Benefits 3/8in drive, 21mm impact socket built for high-torque impact applications. Overall length 32mm (1.26 inches) for controlled access in tight areas. Chromium Molybdenum Alloy Steel delivers strength, durability, and anti-corrosive performance. Heat treated through oil quenching for tough exterior and strong inner core. Matte black oxide coating helps protect the socket during daily shop use. Stamped size markings provide permanent, fast identification for better tool organization. The Genius Tools Impact Socket 21mm 3/8 Inch Drive CR-Mo Steel Durable Heavy-Duty - 343221 is engineered to hold up to repeated impact use with a balance of exterior toughness and core strength. With clear, permanent size ID and ANSI-backed quality expectations, it's a reliable, professional-grade choice for long-term service.