Magnetic Spark Plug Socket 1/2" 21 mm Proxxon PR23396

Proxxon magnetic spark plug socket 1/2" 21 mm PR23396 is a hand tool accessory designed for safe removal and installation of standard 21 mm spark plugs. The socket has a 1/2" drive connection to fit ratchets and torque wrenches and incorporates a magnetic insert that holds the spark plug securely during extraction and refit. Constructed for routine automotive and small-engine maintenance, this socket enables controlled handling and accurate seating of spark plugs without additional adapters.

Advantages

The built-in magnet prevents the spark plug from dropping or tilting while working in confined engine bays, reducing the risk of thread damage. A standard 1/2" drive interface ensures compatibility with common hand tools and torque wrenches for correct tightening. The 21 mm internal hex size matches most spark plug designs, allowing direct engagement and even load distribution across the hex flats. The socket's steel construction provides durability for repeated use in workshop and field environments.

Suitable for

• Automotive spark plug removal and installation on passenger cars and light commercial vehicles
• Maintenance of motorcycles, scooters, and small petrol engines
• Tight engine compartments where secure handling of plugs is required

Key specifications

• Drive size: 1/2" compatible with standard ratchets and torque wrenches
• Internal hex diameter: 21 mm for standard spark plug hexes
• Magnetic insert for secure retention of the spark plug
• Material: hardened steel construction for workshop durability
• Intended use: manual spark plug fitting and removal

How to use

Select the 21 mm magnetic socket and attach it to a 1/2" drive ratchet or torque wrench. Engage the socket onto the spark plug hex and allow the magnet to hold the plug in place. Turn counterclockwise to loosen and remove the plug, taking care when extracting from deep or narrow recesses. For installation, thread the spark plug by hand or by using the socket at low torque to avoid cross-threading, then tighten to the manufacturer's specified torque with a torque wrench if required.

Usage recommendations

Inspect the socket and magnetic insert regularly for wear or damage. Use a torque wrench for final tightening to the engine manufacturer's specification, and avoid using excessive force to prevent thread damage. Keep the socket clean and dry to maintain magnetic retention and tool life.