Spiral Step Drill 101058 RUKO

●Using high-grade material, stable drilling without burdening and chattering is possible.●Step Width (mm):4●Number of Stages (stage):7●Shank Diameter (mm):10●Drilling Dimension (?3mm):5, 8.8, 11.8, 15.3, 19, 24.5, 28●No Coating●High-Speed Steel