Spiral Step Drill 101056E RUKO

●Using high-grade material, stable drilling without burdening and chattering is possible.●Step Width (mm):4●Number of Stages (stage):13●Shank Diameter (mm):10●Drilling Dimension (?3mm):4, 6, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39●No Coating●Cobalt High Speed Steel