Feature(may vary by option.)

●ULTRA FIRMNESS MATERIAL: HSSCo step drill surface is coated with titanium nitride and aluminum to improve the heat and abrasion resistance of the step drill, improving the surface hardness and smoothness of the entire drill, greatly improve the performance and longevity of the drill. It is harder than ordinary steel step drills and has excellent sharpness
●Various Hole Diameter: 0.2 - 0.5 inches (4 - 12 mm) 9 levels, and it can be used to drill and expand various sized holes
●DESIGN BENEFITS: Each step drill is engraved with millimeter precision to improve work accuracy. Each step drill is pressed with a precision of mm to increase the accuracy of your work. Hexagonal shaft double groove design makes the stair drill and drill more tightly
●Spiral shape: Screw groove design reduces pressure during cutting and improves dust removal conditions. Compared to a straight drill, it is more durable and stable when rotating, and greatly improved dust removal and cooling efficiency. Spiral grooves prevent shavings from getting tangled and scratched
●Wide application: step drill is highly versatile. Suitable for wood, industrial, professional uses, home DIY, thin metal, vinyl, stainless steel, aluminum wood, FRP and resin, etc. to enlarge, chamfering, deburring, etc. A must-have item for home & work. It can also be used to drill holes and chamfered at the same time, saving time

[4-12mm 9 segments]

[4-12mm 5 sections]

[4-22mm 10 segments]

Description