good tool, you just find the right pressure (not above 0.6mm)

The product conforms to what is advertised, it works with two AA batteries not included. With batteries, it has a weight that allows him to keep well but it will hold it firmly with your hand to get a good size.

Some of my pencils (graphite as Faber Castell) are too big but for most it will. Most pens are 0.6 (0.8 in the CF, here it does not pass). For others, it offers a clean and quick size, especially on the rods of very good quality like Faber pastels.

Size is triggered by pressure with the pencil so you have to adjust the pressure if the mine can break. So with more pencils "fat" one obtains a slightly rounded point.

The capacity allows not empty too often and the rotating system prevents the size of jams.
I said that I have received the product for free to evaluate it independently.