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
“CIRCUS” FROM LEICHERT
Enlisting in the First world war, the warring countries have moved from a flat ground-water surface warfare in three-dimensional space: clumsy aircraft, recently entertained the public...
WHEN THE BAR IS ROUND
To cut a pipe or wood block round section diameter accurately is difficult. In this case, will help the jig from a wooden block having a groove, the width and height of the corresponding...
