Checkers AC3521-RP-P Aircraft Wheel Chock, Urethane, 20-1/4 in Overall Lg, 9-1/2 in Wd, 2-3/8 in Ht, Yellow, with Rope, 1 PR

Aircraft wheel chocks prevent commercial, military, and private airplanes from rolling or moving unexpectedly. Chocks can be placed and removed quickly and don't require tools to install. Urethane construction absorbs impact, and resists oil, fuel, water, and weather to prevent splintering that can damage wheels and pavement.