(Invisible) This is an invisible door hinge. Recessed hinges specifically designed to be hidden inside doors. Reduce the bulges. When closed, the hidden door hinges can be completely concealed(3 way) The invisible hinge can be adjusted in 3 ways as needed. Inward and outward. Left and right. Up and down(ServiceProviding friendly customer service is our primary goal. Within 30 days after you receive the product, if the product does not meet your expectations (including damage during shipping), please contact our team and we will provide you with satisfactory after sales service(Silent) The concealed hinged body is made of zinc alloy with a matte nickel finish. The bearings are sturdy. The invisible hinge has high load bearing, high compression resistance, and durability. Built in gaskets ensure silent opening and closing(Application) This secret door hinge comes with a complete kitSlotter not included. No additional purchase is required. It is suitable for all kinds of wooden doors with a thickness of >35 mm1 3/8 in, swing doors, etc(Size)This concealed door hinge measures 62.51 inches and is suitable for door thicknesses >35 mm1 3/8 in. The door width < 900 mm. Two can hold up to 88 pounds when used