equipment; but the amateur gunsmith can use these wheels to sharpen his reamers several times before a trip to the grinding shop is necessary. Being under full hand control at all times they can be used right up to the cutting edge.
This mandrel also holds both circular and cup shaped stiff brushes which used with a little pumice or other fine abrasive will quickly polish any odd shaped piece, getting into comers and grooves not reached otherwise.
These are but a few of the many uses to which the gunsmith can
put dental instruments. How often have you wondered about the shape and finish of the locking lug shoulders in a rifle receiver?—a magnifying mouth mirror costing about a dollar would have showed it to you instantly, as well as many other undercuts and "out of sight" places! A pair of cotton pliers (what the proletariat call "tweezers") is invaluable for picking up small screws, pins, and springs. A head mirror with a hole in the center will enable you to look into portions of a gun's internal economy you never expected to see—you can look down the barrel from the muzzle with the breech closed if you wish. Get the light in front of you, reflecting it down the barrel with the mirror as you peek through the hole. Drill a hole in any small mirror and try this.
A small carborundum stone or a cherry burr will forever elimi nate spot annealing—you're ready for the drill in about thirty seconds. Figure 15 illustrates cutting a screwdriver slot in a broken off screw—take9 only a minute to do and the screw is then turned out "easy as pie." Figure 16 shows a 22 calibre barrel being crowned with bud-shaped carborundum and Arkansas mounted points.
The hammer motion of the special head before mentioned is useful in a variety of ways—for light riveting of pins, peening screws used
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