Drillpro Upgrade 3Pcs 1/4 Inch Hex Shank Blue Nano Coated Step Drill Bit Set 3-12/4-12/4-20mm

Description Drillpro Upgrade 3Pcs 1 4 Inch Hex Shank Blue Nano Coated Step Drill Bit Set 3 12 4 12 4 20mmUpgrade Wear Resistant Blue Nano Coating 3 5 Times Longer Than Ordinary Drill LifeSpecification Material HSS 4241 High Speed Steel 4241Coating Blue NanoShank Size 1 4 Hex ShankQuantity 3PcsStep Drill Step Size 3 12mm 3 4 5 6 7 8 9 10 11 12mm 10 Steps 4 12mm 4 6 8 10 12mm 5 Steps 4 20mm 4 6 8 10 12 14 16 18 20mm 9 Steps Features 1 Made of high quality high speed steel 4241 2 New blue nano coating surface treatment 3 5 times longer drill life than other drill bits 3 Sharp drill and no burr 4 Suitable for drill hole ona variety of materials including steel brass wood plastic etcPackage Included 3 Pcs x Step Drill Bits3 12 4 12 4 20mmMore Details