SNS SAFETY LTD RWC-1 Rubber Wheel Chock Heavy-Duty, Dimensions 10.0" L x 6.3" W x 7.3" H (Pack of 1) Wheel chock is a must for any loading dock. Saves lives in the event a truck try to move while loading or unloading. Rubber wheel chock comes with a handle for convenient transportation. Rubber parking chocks are lighter than concrete and will not crack or chip. Environment friendly - made of 100% recycled rubber.