What separates the Bessey trigger clamp from the rest is that it has been engineered from the start to offer a clean design, comfortable handles, up to 600 lbs. of potential clamping force and the ability to quickly transform from clamping to spreading. The transition from clamping to spreading requires no tools. All that is required is a quick push of the locking mechanism to disengage the fixed jaw, move it to the opposite end of the rail and re-engage.