Spiral Step Drill 101050-9T RUKO

●Using high-grade material, stable drilling without burdening and chattering is possible.●Step Width (mm):4●Number of Stages (stage):9●Shank Diameter (mm):6●Drilling Dimension (?3mm):4, 5, 6, 7, 8, 9, 10, 11, 12●Surface Treatment: Titanium Coating●High-Speed Steel