Built to Last: Made from high quality cold rolled steel for maximum corrosion resistance and durability, Gas Spring Lid Support Hinges are designed to provide years of consistent support . Hands Free: Gas hydraulic levers allow you to use your hands inside the cabinet without having to balance the cabinet doors on your head, because once you open the doors to accelerate using these shock absorbers,they stay open until you physically close them. High Load Capacity: Each lid hydraulic pressure hinge can be used for right or left installation. Durable materials combined with a sturdy mechanism allow the gas springs to withstand weightsdoor load up to 10 kg when using 2 pieces Wide Range of Applications: Heavy-duty gas spring support hinges allow the door to lift and stay in place until you pull it. They also allow controlled closing without breaking your finger. Perfectfor all kinds of lids, flaps, tatami mats, etc.