Socket 21mm 1/2in Drive Super Lock

A 21mm super lock socket with a 1/2in drive, made for use with compatible ratchets and breaker bars. It is a straightforward choice for loosening or tightening 21mm fixings during vehicle maintenance, workshop tasks and general repair work.

Used across garage work, servicing and DIY repairs, this socket suits anyone who needs a single common size ready for regular fastening jobs. It is useful when working on cars, vans, machinery or other equipment where a 21mm fastener is fitted, and the 1/2in drive makes it suitable for pairing with standard hand tools already found in many tool kits.

The super lock design helps the socket grip the fastener more effectively than a plain internal profile, which can be useful when dealing with worn or tight nuts and bolts. The 21mm size gives clear fitment for matching fasteners, while the 1/2in square drive keeps it compatible with ratchets and breaker bars that use the same drive size. For regular maintenance work, having an individual socket like this helps keep the right size close to hand and avoids unnecessary swapping through mixed sets when you know exactly what job you are doing.

Socket specifications

• Size: 21mm socket for matching nuts and bolts.
• Drive fitment: 1/2in drive for use with compatible ratchets and breaker bars.
• Design: Super lock socket profile for improved grip on fasteners.
• Application: Useful for vehicle maintenance, garage jobs and general repair work.
• Use: Handy as a single replacement or extra socket for commonly used sizes.

A practical choice for regular maintenance and repair work.