E-Z Coil Thread Repair Kit for Metal - Economy - M39-4.0 x 1.5DEverything 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: (1x) 42115, (1x) M1036, (1x) 42170Applications:Soft metals: aluminum, cast iron, magnesium, etc.