1/2in Dr. 21mm Swivel Impact Socket

Genius Tools Impact Socket 21mm Swivel 1/2 Inch Drive Heavy-Duty Chrome Molybdenum - 480021M Professional Impact Socket SKU: 480021M. This 1/2in drive 21mm swivel impact socket is built for professional service work where access angles change and fasteners sit in tight, awkward locations. The swivel head provides added flexibility while maintaining the strength expected from an impact-rated socket. With a compact 66mm (2.6in) overall length, the design helps keep setups short and controlled. Size markings are stamped for quick identification, and the socket is heat treated through oil quenching with a matte black oxide coating for durability in demanding environments. Key Benefits 1/2in drive 21mm swivel design provides a full range of motion. 66mm (2.6in) overall length fits compact spaces without extra bulk. Heat treated through oil quenching for strong core and tough exterior. Matte black oxide coating supports durability and long-term wear resistance. Sizes are permanently stamped for fast, reliable socket identification. Meets or exceeds ANSI standards established by the American National Standards Institute. Designed and made for professional technicians, this swivel impact socket balances access, identification, and durability for routine heavy use. The combination of stamped sizing, oil-quenched heat treatment, and black oxide coating supports dependable performance when working around obstructions and hard-to-reach fasteners.