This product is a 13 mm bi‑hex (12‑point) socket with a 1/2 inch square drive, designed to engage 12‑point metric fasteners and to be used with 1/2" drive ratchets, breaker bars and torque wrenches. Its primary use is to remove and tighten automotive and industrial fasteners where access and re‑engagement on interrupted or rounded corners benefit from a 12‑point profile.

The socket is manufactured from heat‑treated chrome vanadium (Cr‑V) steel for a balance of toughness and strength, and is chrome plated to provide corrosion resistance and a smooth finish. The bi‑hex 12‑point head profile mates with 13 mm 12‑point nuts and bolts, allowing operation on fasteners in restricted swing arcs. Drive connection is a 1/2" (12.7 mm) square recess compatible with standard 1/2" drive tools; many items include a spring‑loaded ball detent or friction fit to retain the socket on the drive. The tool conforms to recognised DIN/ISO dimensional conventions for hand sockets and meets relevant British Standards for hand tool safety and interchangeability, ensuring correct fit and safe use with matched 1/2" drive accessories.

Typical applications include general vehicle maintenance, heavy plant and agricultural machinery servicing, mechanical assembly and industrial maintenance tasks. The 12‑point profile is particularly useful for fasteners that cannot be accessed for a full 6‑point engagement, and for repeated removal and replacement where speed is important. Industries that commonly use this socket are automotive repair, commercial vehicle fleets, manufacturing and onsite engineering maintenance.

Key benefits of this 13 mm bi‑hex socket are its corrosion resistance from chrome plating, the strength and impact resistance of chrome vanadium steel, and wide compatibility with 1/2" drive toolsets and 12‑point fasteners. The 12‑point geometry reduces the likelihood of rounding on damaged fasteners and allows multiple indexing positions when working in confined spaces.

Duchy Fasteners stocks this socket in single pieces and in sets, with standard and deep lengths where applicable, across a range of metric sizes and pack quantities to suit workshops and trade users. For availability and pack options please contact Duchy Fasteners.