Max Clamp Capacity: 6"Spreading Capacity: 7-1/2" To 13-3/8"Throat Depth: 3-1/4"Max Pressure: 300 lbs.Material: Heat Treated Steel BarOne Handed Clamp Design Delivers Up To 300 lbs. Of Sustained Clamping ForceConverts Easily From A Bar Clamp To A Spreader With Quick Change Spring Loaded Screw, No Tools RequiredLocking Swivel Jaw With Removable Rubber Pads Conforms To Uneven Work Surfaces