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
HOLE WITHOUT A DRILL
How to get a large round hole in the soft and thin plastic? Instead of drill it is convenient to use an ordinary drawing compass gauge: one of the two legs are sharpened the blade and...
IN THE MINI-HAMMOCK… WOOD
This device really looks like a small hammock. But the wood has a direct relationship — used to carry them. In a small sticks (better to have four) are drilled through holes through...
