Hinge Features: Package includes 20 black hinges, 120 screws. Hinge size: 44 x 31 mm. Mounting hole size: 4.2 mm. Screw size: 16 x 6 mm. Hinge Material: The hinges are made of 201 stainless steel with black coating on the surface. High strength, not easy to rust and resistant to erosion. Hinge Structure: The stainless steel hinge is constructed with 6 holes, the central axis is firmly connected, the gap is small and it is not easy to shake. Both ends of the center shaft are provided with rivets to ensure that the shaft does not fall off easily. Easy to install: The stainless steel piano plate comes with compatible screws to meet your needs. They are easy to install and ready in minutes. Versatile: The hinge strip can be used for interior and exterior installations in homes and businesses. Install small doors, windows, cabinets, toolboxes, wooden crates, tool boxes, etc.