INSTEAD OF DRILL — FILE

INSTEAD OF DRILL — FILEWorking 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.

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