For those who wonder what Phil actually bought, I think this is it: https://www.harborfreight.com/2-3-4-quarter-inch-articulated-vacuum-vise-3311.html
Did you try licking the suction cup like we used to have to do with the old "Dart Guns"?
yea, that'll work too.But darts needed to stick to the TV screen in a hurry.