If you need to drill through wall, out the other side exactly in the right place — use…a compass.
Of course, in collaboration with the magnet, which should be put behind the wall just at the desired point: it will show the compass needle.
Recommend to read
CLEAN — THE GUARANTEE OF QUALITY
A good master always holds his instrument clean. Thoroughly washed with cushion will give a uniform coating of the painted plane, and that it is not collecting dust during storage,...
CANS COLD
Usually composed of epoxy adhesive is considered to be usable for 2-3 hours, as at normal room temperature it solidifies soon. If you need for some reason to extend shelf-life, take the...
