Heavy duty cast-iron head, column and base built for steady vibration free performance. Head slides on precision machined cast-iron dovetail ways - stroke is controlled by a gas head-cylinder for smooth operation. Head tilts up to 30 left or right for angled mortising, and pivots up to 180 for off table mortising. Adjustable head height extends working capacity by up to 3" (up to 9" under chisel), to accommodate work with taller workpieces. Equipped with easy to adjust dual depth stop for complete control of both down stroke depth and upstroke travel. Large feed handle with extra long,multiposition arm for better leverage and increased feed control.