SATAGL12916 3/8" Drive Metric Spark Plug Socket 21mm

Drive size: 3/8"; Socket size: 21mm (metric); Deep socket design; Off-Corner Loading (6-point) for reduced fastener rounding; Chrome-plated finish for corrosion resistance; Made from chrome vanadium steel.

Off-corner loading helps reduce rounding of fasteners by distributing torque more evenly, which is especially helpful on worn or dirty plugs.

The bright chrome-plated finish resists rust and corrosion and is easy to wipe clean, helping the tool look new and perform consistently over time.

The 21mm size is specifically designed to fit certain 21mm spark plugs securely, minimizing slippage and damage during installation or removal.

Yes. While optimized for 21mm spark plugs, the socket can be used for other fasteners or components that require a 21mm 3/8" drive deep socket, provided the size and clearance suit the task.

Yes. It is designed to work with standard 3/8" drive ratchets and accessories.

The deep-socket design helps reach spark plugs in tight or recessed areas, improving accessibility and reducing the need for excessive maneuvering.

The socket is made from chrome vanadium steel, offering high strength and durability for repeated use in automotive maintenance.

This socket features large markings for easy size identification, so you can grab the correct tool fast in busy work environments.

If you’re considering alternatives on Fepy, you can compare similar 21mm, 3/8" drive spark plug sockets such as the 21mm 3/8" drive deep spark plug socket (URL: https://www.fepy.com/products/21mm-spark-plug-socket-3-8-drive) and the extended-length 21mm spark plug socket (URL: https://www.fepy.com/products/extended-length-21mm-spark-plug-socket-3-8-drive).