Gross 1/2″ x 21 mm – Heavy-Duty Magnetic Spark Plug Socket for Secure Handling and Precise Engagement
The Gross 13189 magnetic spark plug socket is engineered for high-performance ignition system service. With a 21 mm 12-point profile, this socket offers precise engagement and smooth turning, while the built-in magnetic core securely holds spark plugs during extraction or installation. Compatible with all standard 1/2″ drive tools.
Specifications:
- Drive size: 1/2″ square
- Socket size: 21 mm (12-point geometry)
- Retention system: High-strength internal magnet
- Construction: Durable chrome vanadium steel (Cr-V)
- Finish: Polished chrome-plated for corrosion resistance
- Application: Suitable for spark plug removal and installation in vehicles, motorcycles, and small engines
Benefits:
- The magnetic retention system prevents spark plugs from falling or misaligning—especially useful in deep or narrow spark plug wells. The 12-point design distributes torque evenly to protect both tool and plug from damage. This socket is built for longevity and precise operation in busy workshops or home garages.
- Ideal for auto mechanics, power equipment technicians, and serious DIYers who need a reliable 21 mm spark plug socket with magnetic security for fast and safe spark plug servicing.








