Adeco [PF9107] 24 Openings 4x6 & 6x4 Collage Picture Frame - Wood Photo Collage Decoration - Black for Wall Hanging Horizontal & Vertical

Two questions. 1) Is back panel held to the frame by flat metal strips or metal swivels? 2) Are wall mounts sawtooth brackets or something else?

Is the plexiglass removable? I'm asking because I may paint the frame and that would save alot of taping.

Are they individual spaces for each photo, or do you have to tape them all in place?

What is the total size of this item?