This is a 22 mm bi‑hex (12‑point) socket with a 1/2 inch square drive, designed for use with hand ratchets, torque wrenches, extension bars and breaker bars to fasten and remove metric hex and 12‑point fasteners. Its primary use is for medium‑to‑heavy torque applications where a compact 12‑point profile makes access easier in confined spaces or when engaging fasteners at slight angles.

The socket is manufactured from chrome‑vanadium (Cr‑V) steel and is heat treated to provide a balance of toughness and resistance to deformation under torque. The external finish is bright chrome plating to offer corrosion resistance and ease of cleaning. The head type is bi‑hex (12‑point) and the drive type is 1/2 in (12.7 mm) square. As a hand socket it is not intended for use with impact wrenches; use only with hand‑operated drive tools or torque‑measuring tools. The product is produced to common DIN/ISO/BS dimensional standards for hand sockets to ensure interchangeability with other 1/2 in drive accessories and ratchets.

Typical applications include automotive repair and servicing, commercial vehicle and plant maintenance, agricultural machinery, industrial assembly and mechanical engineering workshops. The 12‑point profile is particularly useful when working on cylinder head bolts, transmission fastenings and in situations where access is limited and a full 6‑point engagement is difficult to achieve.

Key benefits of this 22 mm bi‑hex socket include good corrosion resistance from the chrome finish, high shear and tensile strength from the Cr‑V construction and reliable fit to reduce rounding of fastener edges. The 12‑point design allows more frequent re‑engagement positions on the fastener compared with a 6‑point socket, speeding work in tight spaces while maintaining acceptable load distribution for most maintenance tasks. Compatibility with standard 1/2 in drive toolsets makes it simple to integrate into existing workshop kits.

Duchy Fasteners stocks this 22 mm bi‑hex 1/2 in drive socket (Draper code DR24674) as part of a wider metric socket range, typically available across common sizes and sold individually or in multi‑piece sets and packs to suit workshop and professional requirements.