BikeMaster’s magnetic spark plug socket set is a “must have” for your tool collection. Forget the rubber “O-Ring” style plug sockets which get oily and worn out, these magnets will make removing or installing plugs in modern twin cam engines a breeze! These are designed to be long lasting, unlike the “O-ring” style, which can wear out over time. The MSRP is $19.95 and includes 16, 18 and 21mm sockets.