Not for commercial use or with heavy commercial type trucks or trailers Feature: *Made of durable plastic *Safety device to use with ramps and other lifting devices.Stop at any time, easy to carry. *The main function is to place it between the tire and the ground when parking, effectively preventing the car from slipping back; especially parking on bad roads. *With a handle strap on the back, it is more convenient to carry and move. *The slope is reasonably designed to fit more closely to the tires, suitable for vehicles, and durable. *The concave-convex groove design at the bottom increases the friction with the ground and prevents sliding more stably. Size: Dimensions 7.7Inch L x 4.1Inch H x 3.7Inch W. Package Includes: 4x Tire Anti-skid Stopper note: 1.Not for commercial use or with heavy commercial type trucks or trailers 2.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item.