Notice that the edges are not sharp but really charred not cut; the word "cut" is used euphemistically but a more correct word should be "burned".
The issue is that even with a 15w laser that is not enough wattage to actually cut wood; as you will need at least 40-45w to actually cut wood. Unfortunately there are no 40w solid state lasers.
So it is somewhat deceptive to say that this laser cuts!!