Polishing with a Hand Drill
A Hand Drill Clamped in a Vise and Used to Polish Round-Head Screws
There are certain desired effects in polishing metal that can only be obtained with a true rotary motion. There is no amount of handwork that will produce a proper finish on the round head of a brass screw. Therefore, when small pieces of metal are to be shaped up with the file and polished, simply set them in a three-jaw chuck of a hand drill, and then clamp the drill in a vise, as shown in the illustration. Operate the drill with the left hand and hold the file, or emery paper, with the right, and a finish will be obtained that can in nowise be distinguished from lathe work. It is surprising how different round-head brass screws appear when treated in this manner.