Among the necessary tools are the brace and an assortment of boring bits. The most desirable style of brace is the ratchet brace, illustrated in Fig. 49. The convenience of the ratchet will soon be apparent from the necessity, so often arising, for boring holes or driving screws in angles or close to projections where the full sweep of the brace cannot be taken. Braces are made in many sizes, with sweeps varying from 6 inches to 14 inches in diameter.
Fig. 49. Ratchet Brace.
Fig. 50. Auger Bits.
A brace with an 8-inch sweep is the most convenient in size for boring holes 1 inch or less in diameter in soft wood. For larger holes, and especially in very hard woods, a 10-inch or 12-inch sweep is necessary.
Fig. 51. Extension Bit.
Wood-boring bits are made in many styles. The most important are the auger bits, two styles of which are shown in Fig. 50. They can be bought in sizes running by sixteenths of an inch from 3/16 inch to 1 inch. For holes larger than 1 inch, the No. 2 extension bit, shown in Fig. 51, is the best. It has two cutters, and will bore a hole of any size from 7/8 inch to 3 inches in diameter.
Fig. 52. Gimlet and Wood Drill.
For screw holes, the gimlet bit or the twist drill for wood, both of which are illustrated in Fig. 52, are used. They can be bought in all sizes running by thirty-seconds of an inch from 1/32 inch up to 3/8 inch.
The brace screwdriver, and also the brace countersink for screw heads, are important tools. They are shown in Fig. 53, and can be bought in large, medium, and small sizes.
Fig. 53. Brace Screwdriver and Countersink.