The ELIMINATOR Prop Nut is built to make your trolling motor perform better, longer, and quieter. Designed to lessen prop noise and vibration, The ELIMINATOR Prop Nut stabilizes the prop by providing a larger contact point. In addition, it acts as a heat sink and has built-in cooling ports that reduce the operating temperature for longer battery and trolling motor life. Made to fit most Minn Kota and Motorguide trolling motors. Make sure that you're getting the most out of your trolling motor with the the ELIMINATOR Prop Nut. Will not work with Kipawa and Hydrilla Hacker props. Minn Kota nut available in two sizes, one for 80lb thrust and above, one for below 80lb thrust.