Spark plugs

This category contains spark plug wrenches from Seneca. A spark plug wrench lets you remove and fit spark plugs, even when they sit deep in the cylinder head.

Both professional spark plug wrenches have a T-grip, making it easy to apply enough force, and they are magnetic. The magnet holds the spark plug in the wrench, so you can lift it out of the plug well without dropping it and set the new plug neatly in place. The wrenches are available in 16 mm and 21 mm, two common sizes on petrol engines. They are handy for garages, mechanics and anyone who services their own car, motorcycle or garden machinery.