These Douper 100N/22lb Gas Spring Soft Close Hinges are designed to slow down the closing of cabinet doors, cupboard doors, desk flaps, and more, preventing them from slamming shut. The sturdy construction, made from solid brass and iron with a chrome-plated finish, ensures durability and resistance to corrosion. The hinges extend automatically as you open the lid, providing a smooth and controlled movement. Each hinge has an overall length that extends from 8.6 inches to 11.2 inches. They are ideal for drop leaves weighing between 2.8lbs to 14lbs and are easy to install following the provided instructions.