The installation process of Non-Mortise hinges are much easier and faster than the usual hinges,you only need to do 2 steps,locate the right position and then use a screwdriver to screw the hinge on the door. Without grooving,the hinge will not cause any damage on the door and door frame. A pair of door hinges include 2 Non-Mortise hinges and 20 hinge mounting screws,In case you lose it,we have a few extra screws. THICKER HIGH-QUALITY STEELOur interior door hinge are made of premium stainless steel and have a thicker metal gauge,with a thickness of 0.12,making them more durable. The oil rubbed bronze finish of the door hinges make it less prone to rusting. SMOOTH AND MUTEOur black finish hinges applying superior bearing and lubricated plain bearing construction,the square hinge is capable of rotating 360 and difficult to get stuck or stagnate,ensuring completely mute operation. Tight connection between ball and bearing,effectively ensures smooth opening. WIDELY USEDOur thickened exterior door hinges are matte black,simple and beautiful,can be installed on bedroom,living room,office bathroom,kitchen and other indoor and outdoor areas.