Twin Keyhole Flush Hanger Plate
A 90 x 32 x 6 mm plate that screws onto the back of a shelf, cabinet, mirror or frame with four countersunk #6 wood screws (4.2 mm holes). It then hooks over two wall screws spaced exactly 50 mm apart. Each keyhole has a 10.5 mm entry, a 5.2 mm neck that takes #8 (4.2 mm) or #10 (4.8 mm) shanks, and a 3.5 mm deep hidden channel for the head, so the piece hangs level, lies flat and won't lift off.
home keyhole wall-hanging picture-frame