Please select size from the pull down menu Fractional, Letter Size, Wire Gauge, Paraflute, Stub, Metric, Left Hand & Cobalt Straight Shank Jobber Twist Drill Sets A jobber drill is the general purpose straight shank drill. It has been designed to perform satisfactorily under the most normal conditions in average materials. An intermediate length, furnished with a 118° point. Prentice or Silver & Deming (S&D): S&D drills Prentice or Silver & Deming (S&D): S&D drills are designed with 1/2" shanks, to fit chucks with a 1/2" drill capacity. Used in both drill presses and portable drills where the drill diameter is larger than chuck available.
