Quickly, easily remove or replace your prop with these kits, which are available in three different sizes to fit various Minn Kota prop dimensions (3/8", 1/2" and 5/16"). Each kit includes a prop nut and washer. A crescent wrench is required for installation.WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.