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Review title: Simple and effective
Product review: This product saved me lots of grief. It was really simple to use and did a good job. The only warning I would give is that is designed to be used with the larger of the 2 spark plug sockets. For my little car that wouldn't fit so I had to grind down the end to work with a smaller socket, but that was a simple enough fix. Also as a pointer I would say use a lot of grease when rethreading the hole. This will capture all the metal shavings and prevent them from falling down into the engine. Go slowly and pull out the tap to wipe off the shaving frequently and it is a simple enough task that saves you a large shop bill.
