Step Drill Bit Set Hss Cobalt Multiple Hole

The step drill bit set includes five standard HSS step drill bits that can replace 50 individual drill bits. A drill bit can be used as a substitute for multiple drill bits to meet different needs. With the five pieces step drill bits that we offered, you can process 50 different kinds of diameter holes, which greatly saves you a lot of trouble and space. That means, 50 sizes are condensed into five, making the drilling become more simple and practical.