Super Magnetic Primary Drain Plug for Harley Davidson Sportster XL All Years OUR MAGNETS ARE HIGH TEMPERATURE MAGNETS, GOOD FOR OVER 300 OUR MAGNETS LOOSE ONLY 1/2 OF ONE PERCENT IN A HUNDRED YEARS! THE MAGNETS PULL ALL THE FERROUS METAL OUT OF THE OIL EFFECTIVE IN VIBRATION, TEMPERATURE VARIATION AND PRESSURE SPIKE SITUATIONS. WE USE THE MOST POWERFUL MAGNETS IN THE WORLD