Step drill HSS-TiN. Step drill with spiral flute and 3-flat shank. The HSS-TiN step drill creates smooth and burr-free holes of various diameters. It is ideal for drilling and enlarging holes. Pre-drilling is not necessary, as the cross-ground 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. The step drill is made from HSS steel and is extremely durable when using coolant. The clearly visible and permanent 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. No pre-drilling required, burr-free in thin sheets. For deburring. For round holes. Drilling multiple diameters with a single drill.