GV Tools 3 Piece Spark Plug Socket Set 3/8in Drive This amazing GV Tools 3 Piece Spark Plug Socket Set is ideal if you enjoy spending weekends and evenings working in the garage tinkering or fixing your car! You will need a few tools to change out the spark plugs on your car and spark plug sockets are one of the most important ones and catering from the professional to the DIYer, this set will help you out if you need to fit or remove spark plugs from your engine. 3 x 3/8in Dr. Sockets: 16mm 19mm 21mm Established more than 25 years ago, Geelong Tools is a very experienced producer of toolboxes, tool trolleys and a wide variety of professional and home storage products and has become very well established as one of the World's leading manufacturers of steel storage products.