This is a 27 mm, 12‑point socket with a 1/2 inch square drive supplied in bulk. It is a hand socket intended for use with 1/2" drive ratchets, breaker bars and torque wrenches, providing a secure engagement on hex-headed and 12‑point fasteners in medium to heavy duty fastening and maintenance tasks.

The socket is manufactured from chrome‑vanadium (Cr‑V) steel that has been heat treated and tempered for strength and durability. The external surface is chrome plated to provide corrosion resistance and a smooth finish for easy cleaning. The head type is 12‑point (double‑hex), which allows engagement every 30° for use in confined spaces and is compatible with both hex and 12‑point fasteners. Drive type is a 1/2" (12.7 mm) square recess, compatible with standard 1/2" drive tools. As a hand tool socket it is designed to meet typical DIN/ISO/BS dimensional conventions for sockets so it will interchange correctly with common ratchets and extensions; it is not an impact socket and should not be used with air or electric impact tools.

Typical applications include automotive maintenance and repair, commercial vehicle work, agricultural machinery service, plant and machinery maintenance, and general engineering workshops. The 27 mm size is commonly used on wheel nuts, suspension components and larger engine fasteners where higher torque is required. The 12‑point form is especially useful when working in restricted clearances where small swing arcs are necessary.

Key benefits of this socket are the corrosion resistance afforded by the chrome plating, the strength and torsional capacity provided by the Cr‑V material and heat treatment, and the dimensional compatibility with standard 1/2" drive tool fittings. The 12‑point profile reduces the need for precise alignment and allows more engagement positions than a 6‑point in tight spaces, while the chrome finish helps resist surface rust in workshop environments.

Duchy Fasteners stocks metric sockets across a broad range of sizes and pack options, including single items and bulk packs such as this 27 mm 12‑point 1/2" drive (Draper part DR11888). Please contact us for availability of alternative sizes, drive types and multipack configurations.