5 Pcs Step Drill Bit Triangular Shank High Speed Steel Step Drill Hole Cutter

Automatic deburring during drilling without prior drilling.

Cutting faster, smoother, cleaner, with clear depth diameters at every step.

Made of high quality high speed steel with high hardness and good wear resistance.

They also help to expand existing vulnerabilities.

Step drills are used for thin iron plates, aluminum plates, PV plates, sheet metal openings and reaming holes.