[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 ...

Quick-release clamps usually aren't as long as bar clamps ... Strictly a woodworking tool, this features two wooden jaws and two metal screw rods placed side-by-side with handles at opposite ...