[Durable Material]: Made of carbon steel, it has high hardness, smooth surface and durability, ensuring long-lasting stability for both light and heavy doors.[Smooth Operation]: The lift hinges provide smooth and quiet 360-degree rotation, minimize friction, make doors open and close easily, and reduce wear.[Easy to Install]: The pins and leaves of these hinges are removable, so there is more freedom when installing, and they are designed to be more conducive to welding on various metal doors. These hinges make disassembly and installation so simple.[Application]: These weldable hinges are suitable for industrial or commercial applications, including various metal doors, swing doors, sliding doors, iron doors, dump trailer doors, etc.SpecificationsColor: BlackMaterial: Carbon SteelDegree of Rotation: 360 degreesOverall Size: 85 x 40mm/3.