Jaws for Irwin mini vise. With this you won't mar the surface of item you are grabbing. It's easy to snap on and off since they have tiny super magnets. If you wish to use blue tack or anything similar, you don't need the magnets. I used super glue to keep the magnets (7mm diameter, 3mm height) in place.
Mini Update: Added clamp screw cover for tightening against gentle surfaces to prevent marring.