Working with a file always takes a lot of time, particularly where its course is restricted: in a deep hole, in a curved channel. Here come to the aid of a power drill. Hold its cartridge needle file with round cross-section or chip of a round file with machined shank: spiral cut works great not only during forward movement but also during the rotation. I. POPOV, p. Konosha, Arkhangelsk region.
Recommend to read
SKILLFUL IMITATION
Sometimes at sea the second tier questions the defense put unsoluble problems, missing that great powers have just in principle. So, Spain, its naval policy dictated not by economic...
THIRD HAND
When working with such sensitive measuring instrument like micrometer, it is necessary to hold it with two hands — and what to hold on to what is measured! A kind of third hand may be...
