Up to 50% longer service life , Extremely quiet running , Optimal drilling results 32 Products showing for EXACT Specialist Drill Bits ; EXACT HSS Step Drill Bit 6mm x 36mm · 508-9957 · 07005 · £98.40 ; EXACT HSS Step Drill Bit 6mm x 30mm · 508-9187... Application: for burr-free drilling and scraping of sheets, pipes and profiles. Step cone titanium-coated HSS M2 TIN drill 4-20 mm – Producent PRO TiN Coated Step Drill 7.5MM ONSITE PLUS STEP TIP DRILL BIT – GB FASTENERS Burr Free Drilling Bit The 4 spiral clamping grooves revolutionise the entire drilling process and improve the drilling behaviour by up to 30% thanks to significantly reduced cross forces and less wear due to the optimised force distribution on 4 instead of 2 blades. Product description Exact Advancedline step drill set, diameter 4-20 mm, HSS, tin coating, optional with Rotastop shank Up to 50% longer service life., More power Drilling range: 4-20 mm., Step height: 4 mm., Total length: 70 mm., Shaft diameter: 8 mm.