This is a 10 mm bi‑hex (12‑point) socket with a 1/2 inch square drive, designed to fit 10 mm hexagon fasteners and to be used with 1/2" drive ratchets, torque wrenches, breaker bars and power handles. Its primary use is to apply controlled torque to metric fasteners in maintenance, repair and assembly tasks where a robust drive connection and frequent re‑engagement at tight angles are required.

The socket is manufactured from chrome‑vanadium steel (Cr‑V), heat treated and tempered to provide the torsional strength needed for heavy hand‑tool use. The external finish is bright chrome plating to give improved corrosion resistance and to simplify cleaning after use. The socket features a 12‑point (bi‑hex) head form that allows engagement on the flats or the corners of a hex head at 30° indexing increments, and a 1/2" square drive receptacle with a detent hole to accept a retaining ball or pin; there is no threaded connection on the socket itself. It is produced to meet the dimensional and performance expectations of the appropriate DIN, ISO and BS hand‑tool standards for sockets and drive tools, ensuring interchangeability and safe use with compatible ratchets and torque instruments.

Typical applications include automotive and heavy vehicle maintenance, plant and machinery repair, agricultural and construction equipment servicing, and general industrial fitting and assembly where thicker wrenches or higher torque capacities are required. The bi‑hex design is particularly useful in confined spaces or on fasteners with slightly rounded profiles because it allows more frequent re‑engagement than a 6‑point socket.

Key benefits are the material strength of chrome‑vanadium construction, the corrosion resistance afforded by chrome plating, and compatibility with widely used 1/2" drive tools and accessories. The 12‑point profile provides faster alignment on fastener heads while the heat treatment gives the socket resistance to deformation under high torque.

Duchy Fasteners stocks this 10 mm bi‑hex 1/2" drive socket as a single item and within assorted socket sets; we hold a wide range of metric and imperial sockets in various pack quantities to suit workshop and site requirements.