Thread repair of damaged or worn-out threads Made by the German manufacturer of wire inserts, V-Coil Supplied with twice as many inserts as other brands V-Coil wire thread inserts manufactured from aerospace specification stainless steel Heat and corrosion resistant Supplied in a convenient plastic case to keep all the parts together Sets in sizes up to M12 come with a matching drill bit Includes: 1 x V-Coil tap 1 x V-Coil drill 1 x V-Coil installation tool 1 x V-Coil tang break tool 20 x V-Coil wire thread inserts 1.5D length