This is a knife sharpener from Shimomura Kogyo. It sharpens knives easily and is very user-friendly and convenient. It's battery-operated, so you can use it anywhere. It requires 4 size-D batteries, but I've included new ones to test it, so they're included. I will ship it in the box. The box is a bit worn, so please let me know if you don't need it. Thank you.