Wheel chock is mainly used for fixing the wheels of RV and other vehicles when parking to prevent the vehicle from damage caused by the uneven shaking of the ground. It is an essential helper for rv travel. 1.Heavy Duty Steel Construction, corrosion resistance, high temperature resistance, long service life. 2. Superior Handle Design Reduces Slippage While Mounting 3. The handle can be adjusted to the locking position of the pin. 4. Adjustable length, flexible and convenient use. 5.Eliminates Front-To-Back Rocking Motion,ensure safety.