Irwin Hanson 29-Piece Industrial Drill Bit Set with Case | TurboMax Technology for Metal, Wood & Plastic | Perfect for Construction, DIY & Professional Use

Purchased 2 different size Erwin turbo bits at hardware for a project of drilling several holes in 1/8 steel. They did such a good job and are still good bits I thought I have got to buy a set of these and throw my old drill bits away. So I did.