Our user-friendly 16-piece spark plug thread repair tool kit will definitely be a good helper for repairing damaged spark plug threads with a size of M14 x 1.25 mm, prolonging spark plugs service time. The tool set is supplied with spark plug thread inserts in different sizes for various needs. With the included tap, you can enlarge the spark hole to fit the sleeve. The tool kit is made from high-quality steel for strong strength and long durability. Additionally, all pieces are delivered in a blow-moulded carrying case for easy transport and storage.