I like engineering scales but I don't find them very useful because they are only on one side of the blade and not the other. I often have to switch sides of the knife while I'm working. I'm often forced to hold the blade in one direction and not the other. So I can measure on the wall in engineering but then have to switch to inches on the saw - what agony. I would give this product 5 stars if it had an engineering scale on both sides.