Step drill bit set 3-pc. Step-Ø 4-12mm/4-20mm/6-30mm HSS bright 9/9/13 steps BOSCH

The HSS step drill bits drill smooth and burr-free holes with various diameters. They are ideal for drilling and enlarging holes. Center punching is not required, as the drill bit tip with cross-grinding facilitates drilling. The CNC-milled spiral flute optimally removes chips and enables consistent drilling. Axial and radial relief grinding allow for maximum cutting performance and perfectly smooth results. The step drill bit is suitable for thin non-ferrous metals, stainless steel, and plastics, as well as steel sheet and plastic panels. The step drill bit 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. Further technical specifications: · Design: HSS · Step diameter (range): 4-12, 4-20, 6-30mm · Step height: 4, 4, 4mm