The 4203 electromagnetic variable speed adjustable base features solid state electronic switching and an 11 in. drill travel. Adjustable position on this base makes lining up the bit easier and faster. The 4203 offers adjustablity of 3/4 inch in direction of base length [front -to-back] and 20° right or left of center. lineFeedback speed control maintains speed and a motor/magnet lockout prevents de-mag during operation. For use on any flat ferrous material, 1/2 in. and thicker.