The Cal-Van Tools Drain Plug Repair Kit, No. 38400, is designed to repair aluminum oil pans with damaged drain plug threads size M12 by 1.75 commonly found in GM, Ford and Mazda vehicles. The included inserts allow for the original drain plug to be used, instead of aftermarket plug at a different size. The Drain Plug Repair Kit contains a drill, counter bore, tap, driver, guide and five 12mm inserts. The Oil Plug Repair Kit includes a drill bit, counter boring tool, tap, tap guide, insert tool and five 9.2mm inserts. This tool repairs stripped drain plugs without leakage and allows allows users to use original plug instead of a replacement.