Bessey GSCC2.506 Clutch-Style Bar Clamp, 6 In. - Quantity 4

Great for small jobs, does what it does. Look here and buy here.

I'm used to Jorgensen light duty bar clams for my work but they're a bit pricey. These are the same size bar and clamp head; the bar serrations are on the back edge (J's are on the front) and thus the action's a little less easy but for the price it's a dealbreaker, and the difference now is negligible. They never slip and provide enough pressure for anything I need them to do. I own about 15 of them now, you can never have enough clamps....