To facilitate drilling, we keep in stock a wide assortment of right or left-handed helical spindles, of various sizes and different materials for the processing of all types of metal such as steel, brass, stainless steel, aluminum and various alloys. We have taper shank drills with diameters up to mm 65 and CM5, centre drills, step drills, insert drills, conical boring tools, multidiameter boring tools, masonry drills. Particular diameters as mm 1,75 – 4,25 – 6,75 - 8,25 and so on, are always ready in stock. Different lengths, materials, helics on www.gnuttibortolo.com .. drills! In our stock you can find drill series and assortments too, empty containers to stock all drills in order of diameters.