Complete Rotation: Featuring top and bottom linkage design, the hinges allow full turning when center mounted and partial turning when side mounted, meeting various styles and needs Strong Construction: Made from sturdy stainless steel, these hinges resist rust and wear, ensuring consistent function for both indoor and outdoor applications with long lasting Complete Set: Contains upper hinge, lower hinge, door fastener, hinge screws, fastener screws, a two tip driver tool, and gloves, providing all parts needed for effortless setup Wide Applications: These concealed door hinges are designed for wood and aluminum frame doors, perfect for hidden doors, secret bookshelf doors, and heavy duty uses, providing adaptable choices for different environments Easy Installation: The set includes screws, a driver tool, and protective gloves for simple assembly, minimizing effort while achieving secure and visually appealing results, Manufacturer: Tsophreniq