How the sump plug on a car is magnetised?

The sump plug on a car is often magnetized by embedding a permanent magnet into its design or coating the plug with a magnetic material. This magnetization helps attract and trap metallic particles and debris that accumulate in the engine oil, thereby preventing them from circulating and causing wear or damage to engine components. The use of a magnetized sump plug can enhance engine longevity by keeping the oil cleaner and improving overall performance.