Looking for suitable sharpener

I am happy that mother-in-law given me a spare sharpener, she kept it for many years. Now I have got two sharpeners that can use for sharpen pencils and colour pencils. I need to knock it sometimes because the tip of pencils stucked inside!

With sharpener it does give my life easier without need of sharpen using my hands. Imagine I need to sharpen five or ten pencils a day, every day I need to check his pencil box. I am shocked to know his classmates took his pencils and classmate pencils to use without his permission. Yes gangster or bully in class, the children only 7 year old!