Get your semi truck Ready for the Road Ahead with the ability to seamlessly lock trailers, vehicles, and RVs in place, with the Diamond Rubber 33 Lb Products Wheel Chock. Thanks to its specialized design, this replacement tool is the ideal option to prevent vehicle movement on slopes or inclines, removing the possibility of a runaway truck or trailer. Crafted with a pyramid-shaped design to lock both front and back tires in place. FleetPride is your First Click in Heavy Duty .