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1PC/3PCS 4-32mm 4-20mm 4-12mm HSS Cobalt Step Drill Bit Nitrogen Spiral Grooved Hole Cutter

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                  Description:
                  1PC or 3PCS 4-32mm 4-20mm 4-12mm HSS Cobalt Step Drills Nitrogen High Speed ​​Steel Spiral
                   
                  Specification:
                  Material: High Speed ​​Steel 4241
                  Surface: Nitrogen treatment
                  Groove Type: Spiral Groove
                  Shank: Triangle Shank
                  Sizes:
                  1 * 4- 32 mm in 15 steps (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 mm)
                  1 * 4-20 mm in 9 steps (4, 6, 8, 10, 12, 14, 14, 18, 20mm)
                  1 * 4-12 mm in 5 steps (4, 6, 8, 10, 12mm)
                  Application: for Drilling Carbon Steel Sheet Iron Insulation Boards
                   
                  Features:
                  ● The most popular job that uses step drill bits is sheet metal working.
                  ● People also use step drill bits on auto repair projects and apply them as countersinks.
                  ● The Migiwata step bits come to a point and are thus self-starting. No need to use center punch.
                  ● They are more durable and not prone to break compared with  twist drills.
                   
                  Quantity: 
                  1pc(4-32mm) or 3pcs/set (optional)
                   
                  Warning:
                  1. Due to manual measurement, please allow a bit error, thank you
                  2. Due to shooting problems such as light, there will be chromatic aberration, please be careful.
                   
                  More Details:
                   

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