EZ Jack® Wheel Chock The EZ Jack is made of heavy-duty cast aluminum for rugged use in extreme weight and weather conditions. It"s one-piece lightweight construction allows for easy in handling and storage. It is designed to provide a firm hold on just about any surface. It is ideal for parking your trailer or chocking on inclines. EZ Jack also serves as the perfect solution for leveling recreational vehicles. Its light weight and one-piece design make storage a snap!Manufacturer -->