_Fig. 266. Bit and Square level._]

This tool has three pairs of V slots on its back edges. The shank of the
bit will lie in these slots, as shown in Fig. 266, either vertically, or
at an angle of 45 degrees, and boring can be done with the utmost
accuracy. It may be attached to a Carpenter's square, thus making it an
accurate plumb or level.

MITER BOXES.--The advantages of metal miter boxes is apparent, when
accurate work is required.

The illustration, Fig. 267, shows a metal tool of this kind, in which
the entire frame is in one solid casting. The saw guide uprights are
clamped in tapered sockets in the swivel arm and can be adjusted to hold
the saw without play, and this will also counteract a saw that runs out
of true, due to improper setting or filing.

[Illustration: _Fig. 267. Metal Miter Box._]

A second socket in the swivel arm permits the use of a short saw or
allows a much longer stroke with a standard or regular saw.

The swivel arm is provided with a tapering index pin which engages in
holes placed on the under side of the base. The edge of the base is
graduated in degrees, as plainly shown, and the swivel arm can be set
and automatically fastened at any degree desired.

[Illustration: _Fig. 268. Parts of Metal Miter Box._]

The uprights, front and back are graduated in sixteenths of inches, and
movable stops can be set, by means of thumb-screw to the depth of the
cut desired.

Figure 268 shows the parts of the miter box, in which the numbers
designate the various parts: 101 is the frame; 102 the frame board; 104
frame leg; 106 guide stock; 107 stock guide clamp; 109 stock guide
plate; 110 swivel arm; 111 swivel arm bushing; 112 swivel bushing screw;
113 index clamping lever; 115 index clamping lever catch; 116 index
clamping lever spring; 122 swivel complete; 123 T-base; 124-1/2
uprights; 126 saw guide cap; 127 saw guide cap plate; 132 saw guide tie
bar; 133 left saw guide stop and screw; 134 right side guide stop and
screw; 135 saw guide stop spring; 136 saw guide cylinder; 137 saw guide
cylinder plate; 138 trip lever (back); 139 trip lever (front); 141
leveling screw; 142 trip clamp and screw; 146 T-base clamp screw.

[Illustration: _Fig. 269. Angle Dividers._]

ANGLE DIVIDERS.--This is another tool, which does not cost much and is
of great service to the carpenter in fitting moldings where they are
applied at odd angles.

To lay out the cut with an ordinary bevel necessitates the use of