Answer:
In many hall ways you would stand if not with me in hand.
If two is company and three is a crowd, what is four and five?
I can be long or short. I can be grown or bought. I can be painted or left bare. My tip can be round or square. (one word)
I drift forever with the current and flows to your everyday life. I make living easy but I am good at killing people too.
rub me and a genie might appear
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.