Ratcheting 6 position reversible handle is ergonomically designed to provide comfort in either the right or the left hand positionHeavy-duty rack and pinion with the head traveling on a rack and pinion supported by dovetail ways, you get a solid feeding of the bit into the work piece while providing a lifetime of accuracyRack and pinion fence gives you smooth and accurate adjustments on each and every mortiseRoller bearing support work guides hold the work piece firmly against fence for improved accuracyPull-out table extensions with a full 35" between extensions, this mortiser provides support and stability for even the largest work pieces