[Mgx3d] has done that by designing 3D printable bar clamp jaws with a quick release mechanism that can be used with standard T-slot aluminum extrusion. This allows you to create ad-hoc bar clamps ...

Our Witte clamp is manufactured wiht rugged cast aluminum and stainless steel construction. It has no pieces to vibrate loose, and does not need any adjustment. It opens and swings out of the way ...