Answer:
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
I am the hole in the night, the ever watchful eye. I return in a cycle, to enlighten the sky.
I am so simple that I can only point. Yet I guide men all over the world.
What can go through glass without breaking it?
Inside a burning house, this thing is best to make. And best to make it quickly, before the fire's too much to take.
If lightning strikes an orchestra who is the one most likely to get hit?