Hardware made specifically for attaching to frames or boards as a catch for hooks.
Use with Picture Hooks.
Small - Size: 3/8"X 2" Holes are made for No. 5 x 3/4" flat head steel wood screws
Medium - Size: 1/2" 2 1/4" Holes are made for No. 5 x 3/4" flat head steel wood screws
Large -