High Quality -- The invisible hinge is made of heavy duty copper material, rust and corrosion resistant, durable and strong to use. 180 Degree Opening Angle -- The barrel hinge can be angled 180 for easy use. Hidden hinges with countersunk design allow them completely invisible from both sides and well concealed while using. A Large Loading Capacity -- Having a large loading capacity. The Max. capacity of 2pcs is 8kg. This invisible hinge is available in 4 sizes: 10/12/14/16mm. Please kindly check the dimension image before your purchase. Easy to Install -- Roller rail design for smooth and silent opening, built-in screws help to fix placement, easy and convenient installation, just drill and insert the hinge to finish. Wide Range of Applications -- Suitable for jewelry box hardware, folding table, cabinet door, handicrafts, wine box, small furniture or using on other wood, plastic, thick glass material; Not recommended for heavy duty projects load-bearing. Condition: Brand Material: Copper with gold plating Color: Shown as picture Max. Load Capacity: 8kg /2pcs Life-span: Up to 50,000 times for open and close 10mm Size (Dia. x H): Approx. 10 x 22mm / 0.4 x 0.9inch Package Weight: Approx. 39-142g Package Included: 4 x Barrel Hinges