High Quality Material: Pivot hinge made of high quality stainless steel that will not rust or corrode. For maximum durability, the surface is smooth and can be used for a long time. Unique Design: The kitchen hinge features an upper and lower two-layer structure with a 360-degree rotation function that rotates around the center axis for easy installation and use. Concealed Hinge: The stainless steel cabinet hinges adopt a hidden design, which has a hidden effect when closed after installation and helps to enhance the overall beauty of the door or window. Package Contents: Each pack contains 6 rotating hinges, 56 x 15.5 mm, thickness 2 mm, mounting hole diameter 4.4 mm, center shaft diameter 7 mm, and hole spacing 38 mm. Widely Uses: The hidden hinges are suitable for screens, invisible doors, cabinets, window sills, etc. The hinge can rotate freely and is widely used in different scenes such as bedrooms, living rooms and bathrooms.