Diamond stone sharpener. Easy to use and saves a lot of time cutting easily and piling up firewood quickly. Takes a dull chain and makes it as sharp as new and it holds its edge like a new chain!

Adhesive backing works well, i have one stuck to a shelving unit in the bedroom and the other stuck to an old thermostat. I want it to be mobile, so i can use it where i need it at the time.

Poor latching clips around the side holding the back on are way too small and weak. Then the backs all pop off.