Answer:
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
A dragons tooth in a mortals hand, I kill, I maim, I divide the land.
Plow and hoe, reap and sow, What soon does every farmer grow?
At first I am a yellow weed in the lawn, and then the wind blows, and my white feathers are gone. What am I?
A cowboy rode into Friday. He stayed in town for three days and rode back on friday. How is that possible?
My days are numbered. What am I?