Genius Tools Deep Hand Socket 21mm 1/2 Inch Drive 12-Point High-Strength Chrome Finish - 437821

Genius Tools Deep Hand Socket 21mm 1/2 Inch Drive 12-Point High-Strength Chrome Finish - 437821 Deep Hand Socket

SKU: 437821. This 21mm deep hand socket is built for 1/2" drive setups and features a 12-point profile for dependable fastener engagement. With a 78mm (3.07") overall length, it’s suited to reaching deeper fasteners while maintaining controlled fit and consistent handling.

Constructed from Chromium-vanadium steel alloy, it is designed for high strength, durability, and anti-corrosive performance. A chrome polished finish supports corrosion resistance and long-term tool appearance, while stamped size markings help keep socket selection quick and organized.

Key Benefits

• 21mm 12-point design helps reduce slippage and fastener rounding.
• 1/2" drive size fits common ratchets and hand tool drive systems.
• Deep 78mm (3.07") length reaches recessed and deep-set fasteners.
• Chromium-vanadium steel alloy supports high strength and long service life.
• Chrome polished finish resists corrosion and stands up to shop conditions.
• Permanently stamped size marking improves organization and faster identification.
• Meets or exceeds ANSI standards for consistent, professional-grade performance.

Designed and made for professional technicians, this socket is built to perform over a lifetime of heavy use. Backed by the Genius Tools Limited Lifetime Warranty against manufacturer defects, it combines durable materials, clear size identification, and a corrosion-resistant finish in a practical deep socket format.