Bar/Spreader Clamp 12 Inch Xp I-Beam bar resists twisting and bowing allowing maximum force to be applied. Patented 'Power Locks' hold more pressure, longer. Provides 550 lbs of one-handed force (900 lbs of two-handed force).'Quick Release' trigger for non-explosive pressure release. 'Quick-Change' jaw converts quickly into a spreader. 3" throat depth accommodates larger workpieces. 7-1/2" minimum spreading capacity. Non-marring pads grip securely and protect workpiece finish.