These bright orange wheel chocks are visible and durable. They are perfect for preventing accidental movement of vehicles. Their bright color provides added safety for ingoing and outgoing drivers to see them more easily. The safety tread on the face of the chock provides better grip and reduces slippage. Made of molded urethane for greater durability and resistance to shock, and abrasion. They are also more resistant to damage from oils and solvents and weight less than traditional metal chocks