Like many other reviews, these are a bit crude. But with a little effort, they can be pretty good. I only have one notch and don't use it very often, but I decided to take a chance. You could call it a "set". All the basic ingredients are there, but they require LOTS of work. I'm a locksmith by trade so converting them into useful tools won't be a big deal. The steel tests about 50 Rockwell with my Tsubosan hardness test files. I have a diamond tipped durometer but I haven't gotten it set up or calibrated for them. Good for the price.