_Breeching Taps._—Breeching taps ought to be obtained in pairs, one to enter first and another to follow, cutting a full thread at the bottom. The prices per pair are for the ⅜ inch $2.25; ½ inch, $2.50; ⅝ inch, $2.75. For shot gun taps, ¾ inch, $3.00; ⅞ inch, $3.25. A stock with dies will cost about a like sum, but if the stock be fitted with only two sets of dies, it will be much less. The two threads used for rifle pins are 14 and 16 to the inch. The 14 and 16 threads are not always adhered to. A house in Philadelphia say they use taps of 18 threads, and a firm in Pittsburg advertise taps of 20 threads per inch. _Calipers and Dividers._—The best length of spring calipers and dividers, for common bench work, is about four inches. The cost is from 50 cents to $1.50, according to quality. _Chisels._—The chisels, as used by stockers, are about half a dozen in number. The narrowest is about one-eighth of an inch wide, and the widest about half inch. The set of six will cost about a dollar or a dollar and a half. _Cutting Pliers._—A pair of cutting pliers, six inches in length, for cutting wire, are indispensable. Select those of good quality. Poor pliers of this description are poor, indeed. The cost will be from 75 cents to $1.50. There are patented pliers of this kind in market that are recommended by many who use them. _Drill Stock._—Many kinds are in market, from eight inches in length upward. Some are termed hand drills, and the larger ones, used against the breast, are called breast drills. The hand drills can be obtained as low as 50 cents and upward; the price of breast drills from two to three dollars. Select a drill stock, if one be required, of a size and strength to suit the work to which it will be used. _File Card._—This is for cleaning filings, dirt, etc., that may collect in files. It consists of a strip of common cotton card tacked to a piece of wood conveniently shaped to handle. It is also useful to clean the dirt and debris that will collect in screw taps. The cost is about 25 cents. Shown in Fig. 5. [Illustration: FIGURE 5.] _Fitting Square._—A fitting square with a four, five or six-inch blade is required for many purposes, not only for laying out iron stocks and marking off “square work,” but other work that will come into a gun shop. The gun squares used by carpenters and cabinet makers are very good. If the stock be of iron, or an iron frame filled with wood, they are better than those with wooden stocks. The cost of the six-inch may be about 75 cents. The other somewhat less.