I'm an industrial electrician by trade and I drill a lot of holes in all kinds of steel. This bit set is amazing, just as good as Norseman bits. You will not be disappointed! If you are a clumsy fist you will never appreciate such beats or any good instrument. These are premium dealer beats at a great price! I love them and keep students away from them. I started with a set of Fastenal taps and drill bits, which have served me well, but these bits are even better.