【180° Invisible Smooth Handling】Featuring a concealed articulation design , these Barrel Hinges support 0–180° smooth opening and closing . Once installed , they remain completely hidden from both sides of the box/cabinet , maintaining a clean , minimalist appearance while ensuring effortless , no snag movement 【Compact Space Saving Dimensions】Each Brass Barrel Hinge measures 22mm/0.87in in height and 10mm/0.39in in base diameter , with a 6mm/0.24in opening gap when two hinges are deployed . The compact size is ideal for lightweight applications 【Easy Installation and Reinforcement】The pack includes 8 brass barrel hinges for immediate use . Installation is straightforward : drill holes at the corresponding positions on the box/case , then insert the hinges into pre cut recesses . If loosening occurs , screws in the side slots of the hinges allow for quick secondary reinforcement 【Solid Polished Brass Construction】Crafted from premium solid brass with a polished finish , these hidden hinges boast exceptional durability , wear resistance , and rust protection . The sturdy structure delivers strong load bearing capacity for long term stable use 【Versatile for Small Scale Projects】Brass Concealed Hinges are ideal for jewelry boxes , folding tables , small cabinet doors , handcrafted items , wine boxes , and other small wooden/plastic/thick glass products . Note : Not recommended for vertical or heavy load applications, Manufacturer: PATNFR