The Panavise Jr. is a great vise with a vacuum base. Its jaws open up to about 3" and have grooves for PCBs. It's perfect for light duty field repairs, electronics, hobby and dozens of other projects. This is an exceptionally lightweight, portable vise that firmly attaches to any flat, smooth non-porous surface. A single knob locks the head into position, while a second knob locks the arm at the angle you select.