E-Z Coil Thread Repair Kit for Metal - Economy - 5/16-24 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) 30920, (1x) M1011, (1x) 30970Applications:Soft metals: aluminum, cast iron, magnesium, etc.