Anfrere M2 HSS Step Drill Bit for Impact Drills, 7/8", 1-1/8", 1-3/8" Black Cone Drill Bits for Steel Metal Sheet Hole Drilling Cutting, Multiple Hole Unibit, Stepped Up Bits Home Tools - ubt1050

• The unique 1/2" Square Drive design, suitable for Impact Wrench, 19 size multiple hole stepped up bits, have many steps which contain multiple diameters, convenient to drill different hole size by using a step drill rather than many drills, ideal for DIY projects at home, garden, workshop etc. High Speed Steel: The ladder drilling group performs well in heat resistance, corrosion resistance and rust prevention. The high speed steel structure ensures high durability. High-visibility silver targets for primary 19 hole sizes. come with 19 sizes (3/16", 9/32", 3/8", 7/16", 17/32", 5/8", 11/16", 25/32", 7/8", 29/32". 31/32", 1", 1-1/16", 1-1/8", 1-5/32", 1-7/32", 1-9/32", 1-5/16", 1-3/8"), so you can drill up holes with different diameters, saving your time and efforts to change bits. Fast Chip Removal: Double groove design allows easy particle removal for easy cleaning. Versatility and Compatibility: required for manual or professional personnel. The anfrere step drill can quickly drill smooth holes on holes of different diameters such as steel, aluminum, wood and plastic plates.