Sharpeners are things you use to make pencils sharp again.
Sharpeners are helpful for school and work.
Examples:
I use the sharpener to make my pencil pointy.
Do you have a sharpener I can borrow?
The sharpener in the classroom is broken.
The sharpener makes a funny noise when it works.
I have a magical sharpener that makes the pencil super sharp!
The sharpener is my best friend because it makes my pencil ready for drawing.