90 degree rotation. 4mm thick stainless steel will not rust. Resists scratches, corrosion, and rust. Automatically closes from 25 degrees and self-centers at 0 degrees when in the stop position. The glass door automatically closes from 25 degrees and self-centers at 0 degrees when in the closed position. The bathroom glass door hinges are made of high-quality stainless steel to ensure quality and longevity. Note: Suitable for 8-12mm thick glass. Each hinge has a maximum load capacity of 40 pounds and does not require drilling; it is used for various glass cabinet doors, display cabinet doors, and cake cabinet doors. Package: 2 hinges, 4 expansion screws and bolts, and 1 hex wrench