High-quality materialThe hinges are made of high-quality zinc alloy with black coating, high strength, anti-corrosion and anti-rust.The brushed surface is smooth and can be used both indoors and outdoors, the ball is firmly connected to the bearing and acts as a cushion for the door.Product configurationThe package contains 3 pieces of black hinges.Hinges size: 40 40 mm.Mounting hole size: 6mmStructure of HingeThe stainless steel hinge adopts a scientific design with positioning holes and a solid shaft with 4 holes.The center shaft is firmly connected with a small gap to balance the weight and not wobble easily.Rivet heads are attached to both ends of the center column to ensure that the center column cannot fall off easily.Easy to useStainless steel piano hinge screw holes countersunk design, so that the screws are perfectly embedded, will not protrude, easy to install, safe, do not hurt your hand.Easy to install, just need to tighten the screws, can be completed in minutes.Wide ApplicationSmall size, suitable for most types of doors, with a certain load capacity, not easy to break or deform.Stainless steel hinges can be used in a variety of home installations such as:B. in desktop computers, sewing machines, windows, doors, folding chairs, cupboards and so on.