These really are precision drills! There are no rough edges, everything is polished almost to a high gloss, the edges are razor sharp (and solid), the dimensions are correct. They make the cut look like butter to the point where you don't even have to press. You simply glide over the tree at full power! The wood chips are very fine and the cut is smooth without burning. After repeated cross cuts, the bits will not heat up. They are also really made in Austria, as it says on my packaging, and you can see their personal quality by looking at them. !