Hinge Compatibility Note : Only suitable for doors with a thickness > 40mm! Please confirm your door's thickness before placing an order and select the correct size to avoid incorrect purchases and time spent on returns/exchanges Size : The hidden door hinge is 7x2.8x1 inch, suitable for the door with thickness＞40mm and Width＜1000mm, Two hinges can support up to 177lb and provide a 180-degree opening angle 3-Way Adjustable : Freely adjustable on vertical ± 2.5mm, horizontal ± 1mm and depth ± 2.5mm, inward or outward, left or right available as needed Complete Concealment : This hinge installation will be hidden in the door and wall, its space saving and beautiful visual Advanced Technology : The concealed hinges made of high-quality zinc alloy through integrated die casting processing, enhancing their durability, bearing capacity, and wear resistance. The additional built-in spacers ensure silent opening and closing Quick Note : Our invisible door hinges are engineered exclusively for invisible door systems. Installation requires drilling and mortising, so basic DIY proficiency is a must. If you’re unfamiliar with the process, we strongly recommend hiring a professional for proper fitting, Manufacturer: Hawaminent