This is a 7 mm hexagon socket designed for use with 3/8in drive ratchets, extensions and spinner handles. It provides a 6‑point internal hex profile to engage 7 mm metric hexagon nuts and bolt heads and is intended for hand‑tool torque applications such as assembly, maintenance and repair work.

The socket is manufactured from chrome vanadium (Cr‑V) steel that has been heat treated and tempered to provide the torsional strength required for hand use. A polished chrome plated finish gives good resistance to corrosion and makes the socket easy to clean after use. The tool conforms to standard metric hexagon dimensions and is compatible with commonly used DIN/ISO/BS profiles for hex fasteners, so it will correctly fit ISO and BS specified 7 mm hexagon heads across flats. As a hand socket it is not recommended for use with impact (air or electric) impact tools unless explicitly specified as impact‑rated.

Drive type and connection are standard 3/8in (9.5 mm) square, so the socket will work with most commercially available 3/8in drive ratchets, torque wrenches, bars and adapters. The internal hexagon is a 6‑point design which reduces rounding on bolt heads compared with 12‑point alternatives when used under correct hand torque. The socket is sized for metric coarse and fine threaded hexagon fasteners where the across‑flats dimension is 7 mm.

Typical applications include light to medium automotive and motorcycle maintenance, machinery servicing, plant maintenance, fabrication jigs, electrical enclosures and general engineering workshops. Industries that commonly use this size and drive combination include automotive repair, facilities maintenance, manufacturing, and building services where compact 3/8in drive toolsets are preferred.

Key benefits include durable chrome vanadium construction for reliable strength, a corrosion‑resistant chrome finish for long service life, and wide compatibility with 3/8in drive tool accessories and ISO/BS metric hex fasteners. Duchy Fasteners stocks a comprehensive range of metric 3/8in drive sockets in single pieces and sets, typically from small sizes through to larger 19 mm variants, available in individual packs or assorted kits to suit workshop and mobile toolkits.