【Hinge Specifications】Package includes 8 black hinges and 48 screws. Hinge size: 68 × 38 mm. Mounting hole size: 4.2 mm. Screw size: 16 × 3 mm. 【Hinge Material】The hinges are made of 201 stainless steel with a black surface coating. High strength, not easy to rust, and corrosion-resistant. 【Hinge Structure】The stainless steel hinge is equipped with 6 holes, the central axis is firmly connected, the gap is small, and it does not shake easily. Both ends of the center shaft are equipped with rivet heads to ensure the shaft won't fall off easily. 【Easy to Install】The stainless steel piano hinges come with compatible screws to meet your needs. They are easy to install and ready to use in minutes. 【Versatile】The hinge can be used for both indoor and outdoor installations in homes and businesses. Install on small doors, windows, cabinets, toolboxes, wooden boxes, tool chests, etc.