Patented Power Locks hold more pressure， longer. I-beam bar resists twisting and bowing， allowing maximum force to be applied. Quick-Release trigger for nonexplosive， one-handed operation. Quick-Change jaw converts quickly into a spreader. Nonmarring pads grip securely and protect workpiece finish. Pads can be removed for full contact of the swivel jaws to combat flexing at extreme pressure and to conform to irregular shapes. Ideal for heavy-duty applications such as installation， demolition and rough glue-up.