Answer
Metal sign frames include two different styles: slide-in and bolt-in. Signazon.com offers bolt-in sign frames within the sign accessories page, while slide-in frames are only available through custom orders.
For slide-in sign frames, the sign panel doesn’t actually have to be screwed into the frame. It can simply be slid in from the top for easy sign exchange. You may still want to bolt the sign into place to make sure that it stands up perfectly straight.
For bolt-in sign frames, the frames are designed with screw holes along all four edges to secure a sign. Holes should be drilled into the sign so they match up against the holes that are provided on the sign frame. A bolt is then used to secure the sign to the frame. This is most secure way to display signage outdoors for long periods of time.