6Pcs Step Drill Bits Drill Bits Cutting Parts Set Soft Thin Metal Plates Wood Hole Drilling Tools High Hardness Q81COOTDTYCootdtyFeatures: Step drill bit is used for drilling and reaming steel plate, aluminum, copper, photovoltaic panel and insulation panel. Excellent carbon steel material, strong and durable. Drilling is not easy to slip. Higher precision, sharper, no burrs. Unique step structure, the drill bit can drill a variety of hole sizes. Suitable for installation in a bench drill. Specification: Material: Carbon SteelType: 3pc Triangle Straight Step Drill + 3pc Drill/3pcs Hexagonal Straight Step Drill + 3 pcs Drill/3 pcs. Hexagonal Twist Drill Bit with Slotted + 3 pcs DrillStep Drill: 4-32mm, 4-20mm, 4-12mmSaw: 3mm, 6mm, 8mmColor: YellowPackage Includes: 6pcs Step Drill Bit Drill Bit SetNote: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.