This is a 21 mm, 6-point hand socket with a 1/2" (12.7 mm) square drive, designed for use with ratchets, breaker bars and torque wrenches to tighten or loosen hexagonal nuts and bolts. Its primary use case is providing a secure, full-face contact on 6-point fasteners where controlled torque and minimal rounding of corners are required, particularly in automotive and industrial maintenance tasks.

The socket is manufactured from chrome vanadium (Cr-V) steel and is heat treated and tempered to provide the toughness required for repeated hand use. The outside surface is mirror chrome plated to resist corrosion, aid cleaning and reduce wear; the inside is machined to a DIN/ISO/BS-compliant 6-point hex profile to ensure accurate seating on metric fasteners. The socket accepts a 1/2" square drive tool (hand drive) and is intended for manual (non-impact) use — it is not an impact-rated socket and should not be used with air or electric impact tools.

Typical applications include automotive repair and servicing, commercial vehicle maintenance, agricultural machinery servicing, plant and equipment maintenance, and workshop assembly work where medium to high torque is applied by hand tools. The 6-point configuration is particularly effective on high-strength bolts and fasteners that require even distribution of force across the flats to avoid rounding.

Key benefits of this socket include the corrosion resistance provided by the chrome finish, compatibility with standard 1/2" drive toolsets and torque wrenches, and the strength and wear resistance afforded by chrome vanadium construction and heat treatment. The precise 6-point internal geometry improves grip and reduces fastener damage compared with 12-point alternatives, making it suitable for stubborn or previously rounded nuts within hand-tool torque limits.

Duchy Fasteners stocks this 21 mm 6pt 1/2" drive socket as part of a comprehensive metric socket range, available in single pieces and in sets or rails. Our inventory typically covers metric sizes from 6 mm up to 32 mm and is supplied in individual retail packs and workshop sets to suit trade and industrial customers.