Bosch Professional Zubehör HSS step drill set

The step drill is made of HSS steel and is extremely durable when used with coolant. The clearly visible and permanent diameter markings in both spiral flutes are laser-etched. The HSS 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 cross-ground drill tip facilitates the initial drilling. The CNC-milled spiral flute optimally removes chips and allows for consistent 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.

Specifications: HSS, 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.