24pc Oil Pan Drain Plug Thread Repair Kit Metric Tool M13 M15 M17 M20 Chrome Vanadium Taps of Metric sizes in mm's: M13 x 1.5, M15 x 1.5, M17 x 1.5, M20 x 1.5 Kit is designed for repair Oil Drain Plugs because of stripped thread. Kit includes 20+ oil plug washers per plug size. This tool cuts and oversize thread into the pan/sump and used an oversize plug to be used. Works perfect for gearboxes, differentials, steel or aluminum Works excellent and saves the day.