IRWINQUICK-GRIPOne-Handed Bar Clamp, Heavy-Duty, 12", 1964712 New Quick-Change button easily converts clamp to spreader New removable, swivel jaws and non-marring pads Adjustable foot provides added support and enables clamp to sit upright on the work surface 600 lbs of sustained clamping pressure I-beam bar design reduces bending and flexing even under extreme pressure