Craftsman 5/8 in. 6 pt. Flex Spark Plug Socket
The 5/8 in. Spark Plug Socket, 6 pt. Flex by Craftsman is the best spark plug socket available because of its nickel chrome plated design. This plating makes the socket resistant to rust and corrosion. This is great if you don't plan on using it very often and it will be stored in your garage, where weather exposure is more common. I also love the flexing feature of this socket. It makes the tool more valuable because it increases the easiness with which you will be able to reach the sockets in your vehicle. That's a good feature to have if your car has spark plugs in a hard to reach or tight place.