HIDDEN DESIGN - Our concealed door hinges are specially designed to be hidden from view and do not stand out when the door is closed. Our hinges mean you can use this heavy duty hinge, whether your door is left or right handed. This requires slots, which are not a standard size, but are more suitable for DIY hidden door projects. ! ! PREMIUM CONSTRUCTION - Our concealed door hinges are made of stainless steel to ensure its durability. ADVANCED TECHNOLOGY, RELIABILITY AND SAFETY - The hidden hinge is made by an integrated welding process, which has durability, load-bearing capacity and wear resistance. Additional integrated gaskets and sealed bearings ensure that the installed door can be opened and closed quietly. Easy to Install The hidden hinge is also equipped with 304 stainless steel screws. The high-density self-tapping screw and the hidden door hinge complement each other, and the threaded hole and screw go back and forth, so the bite is not easy to loosen and deform. Before installing the hinge, the blades moved too freely, causing a collision sound. After installation, the door and the provide the necessary support and restraint for the hinge to move smoothly and quietly. Widely used: stainless steel wire drawing Our invisible hinges are suitable for wooden doors, swing doors, secret doors, aluminum doors, fire doors, smoke doors, soundproof doors, security doors, etc., Weight: 0.4188782978 Pounds, Manufacturer: Rtxbvg