Spiral Step Drill 101097 RUKO

●Using high-grade material, stable drilling without burdening and chattering is possible.●Step Width (mm):4●Number of Stages (stage):16●Shank Diameter (mm):13●Drilling Dimension (?3mm):6, 11, 17, 23, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40●No Coating●High-Speed Steel