1/2"-14 NPT Industrial Magnetic Drain Plug (Internal Head) IP-04 Contact us or visit our search engine for application info. Easy to install. Replaces your existing oil drain plug. Removes ferrous metals from the oil that led to damage. Extends the life of your engine or gears. The Gold Standard in Engine Protection! Accept NO substitutions. Installed in the factory on some high-end products. We bring that superior engine protection to you!