مقابس شمعات الإشعال (1/2") قياس (21mm) موديل (GL13916)

The socket uses a 1/2" drive and is a deep, single hex (6‑point) design optimized for 21mm spark plugs.

It’s made from chrome vanadium steel and finished with chrome plating for strength and corrosion resistance.

The deep design provides better access to spark plugs in tight engine bays and helps reach plugs that are recessed or obstructed.

Off-corner loading reduces the chance of rounding fasteners by guiding the contact to the flatter sides of the nut end, improving grip and longevity in tough jobs.

It’s precision-fit for 21mm spark plugs, making it suitable for a wide range of vehicles that use 21mm plugs. Always verify the plug size specified by your vehicle’s manufacturer.

Attach the socket to a 1/2" drive ratchet or breaker bar, align it with the spark plug, and turn to loosen or tighten, ensuring the socket fully seats on the plug before applying torque.

The socket is clearly marked with a large 21mm size marking for easy identification on the job.

Clean any debris after use, dry it to prevent rust, and store it in a protective case or toolbox to avoid impacts that could damage the finish or walls.

Disconnect the battery before maintenance, ensure the socket is fully seated on the plug to prevent slipping, wear eye protection, and keep fingers clear of moving engine components during work.

Compared to other 21mm SATA sockets, this model emphasizes deep reach and off-corner loading for reduced rounding. For direct comparisons, you can explore these alternative SATA 21mm options on Fepy: https://fepy.com/search?q=21mm+spark+plug+sockets, https://fepy.com/product/sata-gl13914-21mm-spark-plug-socket, and https://fepy.com/product/sata-gl13918-21mm-spark-plug-socket-deep

Yes, with its durable chrome vanadium construction, corrosion-resistant finish, and ergonomic markings, it delivers reliable performance and long life for repeated automotive work, making it a strong value for professional use.