Spiral Step Drill 101051F 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):8●Drilling Dimension (?3mm):4, 6, 8, 10, 12, 14, 16, 18, 20●Surface Treatment: Titanium Aluminum Coating●High-Speed Steel