1/2in Dr. 21 mm Swivel Impact Socket

Genius Tools Impact Socket 21mm Semi-Deep Swivel 1/2 Inch Drive Heavy-Duty - 487921M Impact Socket This 21mm semi-deep swivel impact socket is built for demanding fastening work where straight access is limited. The swivel design supports a full range of motion, helping you reach tight or obstructed areas while maintaining the strength expected from a 1/2in drive impact socket. Made from chromium-vanadium steel alloy and finished in a matte black oxide coating, it is engineered for long-term durability and corrosion resistance. Clear, stamped size markings support fast identification during repairs and maintenance. Key Benefits 1/2in drive 21mm swivel impact design supports full range of motion. Semi-deep 80mm length balances access, reach, and control in tight spaces. Chromium-vanadium steel alloy delivers high strength and durable performance. Heat treated through oil quenching for tough exterior and strong inner core. Matte black oxide coating improves protection with anti-corrosive properties. Permanently stamped size markings make identification quick and reliable. Meets or exceeds ANSI standards for quality and professional technician use. SKU: 487921M. Designed for professional-grade service work, this swivel impact socket combines durable materials, heat treatment, and a protective finish to stand up to heavy use.