ZVD - 3pcs Brand Step Drill Bits, Titanium Coated High Speed Steel - [3-12mm, 4-12mm and 4-20mm]

3 standard SAE step drills can drill 28 different sized holes in materials of different thicknesses. The 3 drills are available in the following sizes: 4 to 12 mm: 4 mm, 6 mm, 8 mm, 10 mm or 12 mm. - 4 to 20 mm: 4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm. - 3 to 12 mm: 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm. Made of high speed forged steel (HSS) heat treated, with a titanium nitride coating for longer life. 4241 high speed steel, used in parts with hardness less than 25 HR, and whose thickness of the plate is less than 5mm. The 6.35mm hex shank can be easily inserted into the electric cover, drill press or drive drill. The two-flute design allows for faster, smoother cutting with no shifting, and a 3-stage shank ensures a firm grip. Set includes 3 x 6.35mm hex step bits in HSS steel with titanium coating, suitable for drill sizes 3-12mm, 4-12mm and 4-20mm, with storage pouch. Set of 3 step drill bits Sizes: 3-12 mm: 3,4,5,6,7, 8,9,10,11,12mm.