Material: The hidden door hinge is made of high quality stainless steel, which is corrosion resistant, does not rust, and has strong load bearing capacity. This ensures a long service life and durability. 360 DEGREE FLIP: For folding windows, doors and cabinets. Flexible and durable, strong bearing capacity. The hollow hole design does not stand out, is porous, fixed and does not move Dimensions: distance between mounting holes: 25mm. Total dimensions: 100mm x 32mm. Mounting hole diameter: 5.2mm. Plate thickness: 2mm (each plate) Wide Application: Suitable for wooden doors, cupboard doors, tool boxes and other aluminum doors Easy Installation: Up and down function, easy to install. Contents : 2 hinges Made of brushed stainless steel for long life. Mounting for front door, window, cabinet, tool box, etc. Install on and off. Smooth rotation 360 degrees. Flexible and durable, strong load-bearing capacity. Hollow hole design does not stand out, is porous, fixed and does not move. Contents: 2 sets of hinges hidden.