Our Folding Door Hinge is for folding wardrobe or chest doors. It may be flush mounted into a hole 1/16" deep x 30mm diameter, drilled 6mm off center. Alternatively, it may be surface mounted without machining. #6 or #7 FH countersunk screws are to be used. The open hinge measures 1-15/16" long x 1-3/16" wide (49mm x 30mm). It is constructed of .065 steel with a nickel, brass or bronze plated finish.