Thin drill bits are known to clamp in the Chuck of the drill difficult. However, there is a cartridge that copes with it easily — as used in the compass. That and they need to use it. Installing it in the drill and releasing of the leg of a compass, then insert it into the Chuck of a drill already is not difficult.
Recommend to read
ECONOMICAL PENCIL
When the hand is not a pencil of suitable color or hardness. would be useful and "bits", but they are inconvenient to use, they can be extended by sticking in a metal or plastic tube of...
DEFENDER AIR BORDERS
During the war in Korea was shot down by an American fighter jet F-86 "sabre". After studying Soviet specialists captured machine, the Soviet government in the beginning of 1953, decided...
