Paragraph 12. It is sometimes necessary to bore holes at a definite angle. To do this determine the desired angle and set the T bevel. In starting the bit hold the properly set T bevel in such a position, as shown in Figure 29, so the bit will stand exactly parallel with the blade of the T bevel. Keep the T bevel handy so that you can test frequently during the boring and thus keep the angle constant. It is hardly safe to depend upon the eye in particular work if you are attempting to bore at an angle.

Figure 29.