1. Wheel Chock Auto clip and lock system. Flat packaging; 2. Fits 17"-18" wheels. 3. Rubber Ends 4. Light Weighted. 5. Cold roll #45 steel offers excellent mechanic performance. 6. The difference between our wheel chock with other factories is that we use top quality surface finishing powder and debur every welding point; Also our seven-eleven running stream has much better quality than random work factories. 7. Package: Carton box, 1PC/1CTN; Carton size: 61.5x53x15.5cm 8. Gross Weight: 11.00KGS/CTN