DSLR Cage and accessories. The cage is for a GH4 (https://www.thingiverse.com/thing:2522425) however you can modify it to fit a canon by drilling out the battery access area. The mounting holes on the sides are meant for a number 10 screw(they of course need to be taped). The rail mount is for 16mm rails. These hot shoes mounts are for mounting on top of the handles.