Spiral Step Drill 101098T 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):10●Drilling Dimension (?3mm):6, 9, 12.5, 15.2, 18.6, 20.4, 22.5, 28.3, 30.5●Surface Treatment: Titanium Coating●High-Speed Steel