Drillpro Upgrade 3Pcs 1/4 Inch Hex Shank Blue Nano Coated Step Drill Bit Set 4-12/4-12/4-32mm

Description: Drillpro Upgrade 3Pcs 1/4 Inch Hex Shank Blue Nano Coated Step Drill Bit Set 4-12/4-12/4-32mm Upgrade Wear Resistant Blue Nano Coating, 3-5 Times Longer Than Ordinary Drill Life Specification: Material: HSS 4241 / High Speed Steel 4241 Coating: Blue Nano Shank Size: 1/4" Hex Shank Quantity: 3Pcs Step Drill Step Size: 4-12mm:(3,4,5,6,7,8,9,10,11,12mm, 10 Steps) 4-20mm:(4,6,8,10,12,14,16,18,20mm, 9 Steps) 4-32mm:(4,6,8,10,12,14,16,18,20,22,24,26,28,30,32mm, 15 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 on a variety of materials including steel, brass, wood, plastic, etc Package Included: 3 Pcs x Step Drill Bits 4-12+4-12+4-32mm More Details: