FUZVOL 3 PCS HSS Step Drill Bits,Drill Bit Set,High Speed Steel-4 to12/20/32 mm-Hex Shank Metric Drill Bits,Drill Bit Cone Hole Cutter Tools for Stainless Wood Metal Plastic Sheet

HSS Material:Step drill bits are made of high-speed steel with a titanium coating for increased wear and oxidation resistance.It's made of trustworthy materials Ladder Structure:One step drill is equivalent to multiple drills for a wide range of hole sizes.Avoid frequent bit changes during drilling work Efficient Tool:Each step drill bit is clearly marked with a scale.It is more precise when drilling holes,helping you save time and increase drilling efficiency Size Range:Includes three sizes of (6.35mm) hex shank step drill bits:4-12mm,4-20mm and 4-32 mm.Meet your different size drilling needs Appliance:Our step drill bits are used for drilling holes in wood, stainless steel, sheet metal, plastics, PVC sheets and other materials.1/4"(6.35mm) hex shanks are suitable for most power drills