CORSE DYNAMICS Magnetic Oil Drain Plug V2: Testastretta - Red Our "double hex" design allows you to remove or install these plugs with either the factory tool OR an ordinary wrench or socket. Our plugs incorporate a Viton O-ring to ensure proper sealing against the engine. This provides a good seal every time Our plug comes pre-drilled for safety wire on all six faces. Our plugs include a rare earth magnet to collect any metal bits that might be inside your engine, our magnet is rated at six times the strength of other competing companies. New feature of the V2 drain plug, we are the only company to broach the allen key in the drain plug to ensure ultimate strength, this manufacturing process is often over looked because of high tooling cost versus milling a hex with 6 drilled holes on the end. Those 6 holes leave weak points in the hex that are prone to failure with thin wall aluminum. Don't be alarmed the other drain plugs will work, but we take pride in over building and improving all of our products to there up most potential.