Pictures Metal Core Wheels For Scooters What Is The Best Way To Hang A Metal Frame?

What is the best way to hang a metal frame? - pictures metal core wheels for scooters

I am preparing a picture frame, metal, and I hoped that a piece of hardware, 2 purposes: 1) at the base foam against the chassis support, and use 2) to find to serve hang the picture. Several ready-made frames with this piece come. It's like a small U-tip-shaped metal clip together, just to fit in the back of the case molding, and a hole saw, which may hang the picture. What is called the metal piece? If this is the best way to hang my picture?