Durable for extended use: Made of premium zinc alloy with maximum corrosion resistance and durability, the lid hinges are made to provide consistent support for years to come Dimmable: with the Allen wrench included, the hinges are fully adjustable for different weights by turning the screw in the middle of the arm to set the appropriate friction pressure so that the lid does not fall off when closing High load capacity: each lid can be used for right-hand mounting or left. Durable materials and sturdy mechanism allow the hinge to support a weight of up to 10 kg when 2 pieces are used Widely used: double arm folding support hinges can hold the door in any open position or leave it open slide down smoothly without breaking your fingers, perfect for a variety of lids or flaps.