The CRAFTSMAN 4 piece spark plug socket set features the following sizes: 5/8 in., 13/16 in., 3/4 in. and 18mm. Each one has 6 contact points. The spark plugs have easy to read markings, which is ideal for working in low lit and greasy environments.
Also question is, do I need a special tool to remove spark plugs?
Changing spark plugs takes about an hour (for a four-cylinder engine) and will save you at least a hundred bucks in labor. You can use the same old tune-up tools (ratchet, spark plug socket and gap gauge). You should use a torque wrench to tighten the plugs. But there’s a way to get around that if you don’t have one.