Solid Construction: A great, defined, rail construction makes sure the clamps do not slip and tighten very effectively when really putting the pressure on. (6-inch clamp rated up to 150lbs, 12-inch clamp rated up to 300lbs).
Quick-clamp: The quick-release latch makes it so easy to take them off your project or adjusts the fix in seconds.
Non-marring Pads: Larger pads provide a larger area of thrust surface. More balanced force and parallel clamp. Non-marring, non-slip texture protects your project.
2nd Usage - Spreader: The unique quick-change button design allows the F clamp to be a spreader as well. Just press the red button to take the jaw off and then reverse it before putting it back in, you will get the spreader you need.