1. Effective Protection Designed to keep your trailer securely in place, prevent wheels from rolling or sinking into soft ground. This feature ensures stability and safety when your trailer is standing, and distributes weight evenly to reduce lateral movement. 2. Reliable Material Made of durable rubber, these heavyduty wheel chocks provide reliable protection for jack rollers. Their durability guarantees a reliable solution for maintaining stability and safety during all your outdoor activities. 3. Product Size With the dimensions of approx. 6' x 5' x 3.8', these chocks are designed specifically for 6' rollers. They can withstand various weather conditions, making them for securing your trailer anywhere. 4. Extended Life Equipped with drainage holes, these wheel chocks effectively keep jacks of sand, oil, mud, and dirt. This innovative design extends their lifespan while ensuring maintenance of your trailer wheels.