WIDE APPLICATION: Used for jewelry box hardware, folding table, cabinet door, crafts, wine box, small furniture or use on other wood, plastic, thick glass; Not recommended for heavy-duty load-bearing projects. EASY INSTALLATION: Roller guide rail design provides smooth and quiet opening. Built-in screws help to fix the placement. Installation is simple and convenient, just drill and insert the hinge to complete. 180° OPENING ANGLE: It has a unique design with a 180-degree opening angle, extremely convenient for you to open or close the box. Hidden hinges with milled design make them completely invisible on both sides and hide well when using. PREMIUM MATERIAL: The invisible hinge is made of sturdy brass, with fine structure, rust and corrosion resistant, durable and solid, it can be opened or closed smoothly and silently. DIMENSION: The invisible hinge of the barrel with a diameter of 10mm/0.39inch, features smooth operating mechanisms and finely machined. Note: The data is manual