转笔刀 / Pensil Sharpener

When people use a pencil, sometimes they would drop it away because it is too short to hold, which is absolutely a waste; or sometimes they couldn't hold it since the hand is slippery. This pensil sharpener turns the common box shell into gear shape, which is designed to collect the pencil scraps, making it more convenient to hold and spin. The back shell is made like a clamp, which can help people easily hold the pencil when it is too short or when the hand is slippery. It adopts the "natural fibre strengthened plastic", environmental friendly, and can replace the crude as a renewable resource (plant fiber).