MOTO-D Neodymium "Super High-Temp 48" Magnetic Drain Bolt pulls Metal Engine Shavings keeping your Oil Cleaner. Pre-Drilled for Safety Wire. Lightweight Aluminum Construction in Anodized Black Color. The Drain Bolt has an Embedded Neodymium Rare Earth Magnet which holds Metal Engine Shavings to keep your Oil Clean. This is the strongest magnetic drain bolt on the market for your precious motorcycle. Includes Metal O-Ring Washer for Proper Installation.