The hole in the metal plate can be obtained without drill: it is enough to bend it and work a round file or a needle file. This technique is especially useful when you want an oval hole. It is applicable for punching a rectangular window or a narrow slit: in this case, use is not round, but flat needle file or hacksaw.
Recommend to read
THE BEARING IN ONE PLACE
To install the ball bearing in the workplace, it is necessary to produce it under the special case that is often associated with certain difficulties. Here is one simplified but reliable...
SUDOMODEL
At the organization of ship modeling circle head meets with a problem: where to start? Introducing a new section, the editors attempt to facilitate the selection of practical material...
