Hinge Compatibility Note：Only suitable for doors with a thickness > 35mm! 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 6x2.5x1 inch, suitable for the door with thickness＞35mm and Width＜850mm, Two hinges can support up to 88lb and provide a 180-degree opening angle 3-Way Adjustable ：Freely asdjustable on vertical ± 3mm, horizontal ± 2mm and depth ± 1mm, inward or outward, left or right available as needed Complete Concealment ：This hinge installation will be hidden in the door and wall, it’s 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