Hang it on your ear and fix it at the fourth corner.

Extended data:

Main disadvantages: Pencil Sharpener Pencil Sharpener has two disadvantages:

The tip of the pencil sharpener is too sharp, and it is easy to cut the paper when writing, and the tip is easy to break. Due to the great difference in the thickness of the pen tip, the handwriting is uneven when writing;

The cutting amount of the blade or milling cutter on pencil lead is too large, and most of the lead cores are actually cut off rather than cancelled, which is a great waste.

Life common sense

What if the pencil sharpener is dull?

It's actually quite simple. Just wrap a layer of fine sandpaper around the pencil tip and put it in a pencil sharpener for several turns, and the blade will be sharpened. When sharpening a pencil with an electric pencil sharpener, never reach out and touch the sharp blade to avoid cutting your fingers.

2. Can a pencil sharpener be sharpened?

Can't be ground. The pencil sharpener inside is made by machine, and there is no tool suitable for grinding this kind of knife. Generally, larger stationery stores can match knives in the corresponding pencil sharpeners, such as the well-known brand: Miki. You can get a knife, so for the best effect, you should get another one or buy a pencil sharpener.

References:

Baidu encyclopedia-pencil sharpener