The GReddy Magnetic Oil Drain Plug features a strong neodymium magnet of 5000 gauss. The neodymium magnet is one of the most powerful available on the market. The hard anodized aluminum drain plugs are available in three popular sizes to fit most Japanese engines. Using the "GReddy Magdrain" plug helps reduce uncertain materials in the engine while extending the engine's lifespan. The GReddy 13901304 Magnetic Oil Drain Bolt Plug M16 x 1.5 is compatible with the Scion FR-S, Toyota FT-86, and Subaru BRZ.