First of all, this product is great and I enjoy using it, but it measures 1.4 inches instead of an inch and a half. I use it on plastic, it leaves a great finish even when roughing, the cut is good and leaves a vertical wall when cutting a groove etc. I have no reason to get upset that it's not quite the same. advertised size, I can get it to work for my needs and have no problem ordering additional tools from this company.