Irwin Tools 1964718 Quick-Grip Medium-Duty 1-Handed Bar Clamp/Spreader, 12"Multi postion jaws, both jaws adjust to multiple postions on the bar. Removeable reversible jaw for clamping or spreading. One handed clamp delivers 300 lbs of sustained clamping force, and locking swivel jaw for evenly distributed clamping force. Quick Grip Clamping capacity: 12" (30 cm) Spreading capacity: 7 1 2" 19 1 4" (196 mm 488 mm) Throat depth: 3 1 4" (81 mm) Multi postion jaws Both jaws adjust to multiple postions on the bar Removeable