¥ Extremely fast and easy to use. ¥ Pressure bar is "crowned" to ensure all boards of equal thickness are held tight. ¥ Has safety trigger and requires two hands to operate. ¥ Holds boards from shifting while tightening clamps. ¥ Cylinder has two moving parts, a piston and return spring. ¥ Air pressure required-100 psi. ¥ Will deliver years of useful service.