A cool clamp I designed based on a Cardellini clamp. Used on movie sets around the world!  Use it to clamp onto a myriad of surfaces - pipes, doors, tables, 2x4's - and attach a camera or a light, a reflector, or a Gobo head.  The possibilities are endless!

This clamp is only as strong as you print it, however.  Nowhere near as strong as the aluminum version, but usable.  I added ¼-20 threaded holes to the top and bottom so it could be used as a tripod-mount for a camera or light.  Also equipped it with a Mathews pin - just like the original.  Again, don't plan on hanging a 20K from this thing!

I printed mine in PETG at 90% infill.  You may be able to print without supports if your printer is dialed in, otherwise using supports for parts of the jaws that are up off the bed is a good idea.  have fun!