These are designed to snap, slide, or clip into the open channel on the back of a metal frame.
The metal frame must have a #11 Profile which is about 95% of the current metal moulding market.
All of the metal frame hardware we offer will fit on all currently manufactured metal frames with the #11 Profile. Includes the metal moulding currently made by Nielsen, Clark, Designer, Alumaframe, Global Art, MCS, Decor and most OEM manufacturers.