D-Ring hangers can be used with wire by placing two on the back of a frame.Or you can use d-rings without wire and using the ring itself to hang on a hook or screw on the wall.
Strap hangers come in many sizes and finding the correct size strap hanger for your wood frame is important.You can see the detailed measurements for the d-ring hanger in the photos.The hanging hardware includes #15cm x 1.3cm screws which are pan head sheet metal screws with a combo slotted/Phillips top.