Lightweight but strong, these have a heavily reinforced design. Thick plastic construction is tough and durable for continual use Non-slip grid surface, provides friction against tires, even with snow and rain contact Sharp angle shape to slot in against walls to prevent tires lodging and becoming stuck Made from high quality lightweight plastic with UV protection High-strength fiber: PP mixed material, strong bearing capacity, strong and durable Ideal for low SPORTS cars to get access for trolley jacks, light and easy to store When two pairs are used they are ideal for classic car storage lifting the car and preventing the build up of moisture under the tires Gripped surface: Non-slip grid formation of the van ramp prevents tires slipping when in use for safety, even against water and sn.