This concealed door hinge is designs for seamless installation, seamlessly blending into the door frame Suitable for door with a thickness of 38-50mm / 1.5-1.97inch and a width of Less than 900mm / 35.43inch Make of Stainless steel materials, which enhances the resistance, durability, and rusts resistance Can be used for bedrooms, kitchens, living room, classrooms, hotel, offices, wood houses, shops, dormitories Adopts a 125° horizontal opening angles designs, which can silently open and close the door from multiple angles, Manufacturer: Obotsnoi