Yangoutool HSS Step Drill Bit Set, 3Pcs Hex Shank Coated Step Drill Bits Set,4-12/20 / 32mm Large Titanium HSS Step Cone Drill BitBrand: Yangoutool Color: 4 12 20 32mm Features: Two Flute Design for smoother cutting,no need to use center punch. Metal drill bits for steel have 4 12mm 4 20mm 4 32mm,Shank: 1 4" Quick Change Hex Shank. To reduce Burr,Chamfering,oval Chamfering that can't be done by twist drill bits. It is more convenient to use a single drill bit to open multiple specifications. Wide range of uses: automotive sheet metal, repair and renovation, bridge frame, home
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Yangoutool HSS Step Drill Bit Set, 3Pcs Hex Shank Coated Step Drill Bits Set,4-12/20 / 32mm Large Titanium HSS Step Cone Drill Bit