These double-sided clips from Calumet are perfect for controlling light within small-scale or tabletop photography setups. The sprung clips rotate on the steel U that connects them, so they’re easily manipulated to stand on their own, with one clip acting as a foot while the other clasps the reflector. They’re sized to hold small homemade reflectors (Mylar glued to cardboard is one of my favorites, see below) in order to bounce light precisely where you need it on your miniature set. They can be used with something like a small piece of black foamcore to block light (flag), as well.
These little clips are among my most valuable tools for food photography; my ideal setup is a single large light source (often a window) and a bunch of 3″x3″ reflectors on these clips to redirect the light within the scene (see below).
They’re superb for shooting jewelry, Lego constructions, anything small, putting highlights exactly where you want them or just bouncing bits of light to illuminate your subject.