Bohrcraft 17601330003 - Bohrcraft Jg. HSS step drill bits, ABS case // # 1 - 2A - 3A /3-pcs.

STB 3-K Step Drill Set

Contents (3 pieces): Size: 1 / 2A / 3A Range: 4 -12 / 4 - 20 / 4 - 30 mm.

Step drill bits made of solid HSS, hardened and ground according to the so-called CBN method.
The special shape of the drill bit ensures that all dimensions can be used for both centering and drilling.
Provided with size indication, division point.
Long service life.
Cylindrical axis.
For automotive and electrical applications, mechanical engineering, distribution cabinets and plumbing.
Step drills are suitable for thin materials up to 2.0 mm sheet thickness and non-ferrous materials up to 4.0 mm sheet thickness.
Suitable for the most common materials such as sheet steel, stainless steel, plastics and non-ferrous metals.