Early Rockwell drill presses tend to have simple belt guards, leaving all but the front pulley exposed. They also didn't have the best depth stops. Available in floor model and bench top units, look for the length of quill stroke (Bigger is better) number of steps in the pulleys, which equates to number of speeds, and throw from the spindle to the column. This is usually stated as the size of the drill press: a 16" unit will drill to the center of a 16" circle, so that means the distance from the center of the bit to the column would be 8".Click here for Delta/Rockwell Drill Press Drillpress For Sale