Bosch Professional Zubehör HSS-TiN step drill set, 3 pcs., 4-12/4-20/6-30

The HSS-TiN step drill creates smooth, burr-free holes with various diameters. It is ideal for drilling and enlarging holes. Center punching is not necessary, as the drill tip with cross grinding facilitates the initial drilling. The CNC-milled spiral flute optimally removes chips and allows for even drilling. Axial and radial relief grinding ensures maximum cutting performance and absolutely smooth results. The step drill is suitable for thin materials made of non-ferrous metals, stainless steel, and plastic, as well as steel sheets and plastic panels. It features a 3-flat shank. The drill is made of HSS steel and coated with TiN (Titanium Nitride). The lifespan when using coolant is exceptionally high. The clearly visible and durable diameter markings in both spiral flutes are laser-etched. Additionally, the 3-flat shank prevents slipping in the chuck and allows for the transfer of high torque.

Specifications: HSS-TiN, step diameter (range) mm: 4-12; 4-20; 6-30, shank diameter mm: 6.0; 8.0; 10.0, step height mm: 4; 4; 4, total length mm: 66.5; 70.5; 93.5.