E-Z Coil Thread Repair Kit for Metal - Economy - M3-0.5 x 2DEverything needed to repair or reinforce tapped holes in metal in a convenient, easy-to-order kit.FeaturesEconomy kits include threaded inserts, STI tap, and installation tool.Kit Contains: (10x) 40220, (1x) M1004, (1x) 40270Applications:Soft metals: aluminum, cast iron, magnesium, etc.