This is a 12 mm impact socket designed for use with 1/2 inch (1/2") square drive impact wrenches, rattle guns and breaker bars. Its primary use is to apply high torque to hex-headed fasteners in demanding maintenance and assembly operations where standard chrome sockets would fail. The socket is a 6‑point (hex) internal profile to engage flat faces of fasteners and reduce the risk of rounding.

The body is manufactured from heat‑treated chrome‑molybdenum (Cr‑Mo) alloy steel and is quenched and tempered for toughness under repeated impact loading. The surface finish is a matt black phosphate/oxide coating to help resist corrosion and to reduce glare in workshop environments. The external drive recess accepts a 1/2" square drive and includes a spring steel ball detent to secure to drive tools. As a specialist impact socket it is produced to standard DIN/ISO 6‑point profile dimensions and to relevant BS/EN dimensional tolerances for interchangeability with other sockets and tools.

Typical applications include automotive wheel and engine work, agricultural and plant machinery service, construction plant maintenance and general industry where pneumatic or battery impact tools are used. The 6‑point configuration is particularly suitable for high torque fastenings and for use on slightly worn or corroded hex heads because it grips the flats rather than the corners. Workshops, garages, fleet maintenance depots and on‑site service engineers commonly specify impact sockets of this construction for their durability under repeated heavy use.

Key benefits of this 12 mm impact socket are its impact‑rated Cr‑Mo construction which provides superior toughness compared with chrome‑vanadium sockets, a corrosion‑resistant black phosphate finish, and precise 6‑point profiling for secure fastener engagement. It is compatible with any standard 1/2" square drive impact wrench, ratchet or breaker bar and is suitable for regular use in professional environments.

Duchy Fasteners stocks this item in single pieces and bulk packs for trade use, and carries the wider socket range from 8 mm up to 32 mm in 1/2" and other drive sizes; please contact us for pack sizes and availability.