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 LEGENDARY “VARYAG”
Exactly one hundred years ago the name of this ship became known around the world. On the morning of 9 February (January 27 old style), 1904 the cruiser "Varyag" was on the RAID of the...
HOMEMADE AUTOCLAVE
Real benign stew without autoclave do not like, however, and other canned goods. However, the production of inexpensive home-autoclaves our industry, it seems, a long time will not be...
