Spiral Step Drill 101534E RUKO

●Using high-grade material, stable drilling without burdening and chattering is possible.●Step Width (mm):4●Number of Stages (stage):12●Shank Diameter (mm):10●Drilling Dimension (?3mm):6.5, 8.5, 10.5, 12.7, 15.2, 16.2, 18.6, 20.4, 22.5, 25.5, 28.3, 32.5●No Coating●Cobalt High Speed Steel