The set contains 19 HSS Co spiral drill bits with diameters from 1 to 10 mm. They are designed for drilling into steel and stainless steel. The precision-ground drill bits contain 5% cobalt, have a smooth cylindrical shank and a split-point tip with a 135-degree angle for more accurate positioning at the start of drilling. The drill bits are stored in a closable case with marked positions according to diameter.