The phot r heavy duty metal studio clamp with a light stand attachment is a very handy mounting adapter that attaches to a standard light stand and mounts anything from a piece of cardboard or foamcore used as a flag to a pop out style reflector or background the holder has a 58 receiver for light stands with a 58 top stud due to the metal design it has a higher load capacity than the plastic versions this reflector holder set is perfect for positioning your reflectors during a photo sh