Chat with our AI personalities
you are concerned with marking and drilling the the center of the hole. Make a + mark where you want the center of each hole. You can punch the center of that mark with a nail to help the bit stay in the middle.
no. a hole is a hole no matter how deep it is, you can't have a half unless you compare it to another hole.
No, because the answer depends on what you are drilling through and why. Drilling a guide-hole through a wooden plank is somewhat different from drilling for an ice core in the polar regions or for minerals underground. So the question is so poorly specified as to be unanswerable.
None, because it is a hole!
1 second= 1 mile