Answer:
You can hold it without using your hands or arms. What is it?
I crawl on the earth. And rise on a pillar.
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
What is lengthened by being cut at both ends?
It cannot be seen, it weighs nothing, but when put into a barrel, it makes it lighter.
My days are numbered. What am I?