Spiral Step Drill 101090F RUKO

●Using high-grade material, stable drilling without burdening and chattering is possible.●Work material: Iron plate(strength of 1100N/[[MM2]] or less), aluminum, brass, plastic(up to 4mm)●Step Width (mm):4●Number of Stages (stage):11●Shank Diameter (mm):10●Drilling Dimension (?3mm):6.5, 8.5, 10.5, 12.5, 16.5, 20.5, 25.5, 29, 32.5, 36.5, 40.5●Surface Treatment: Titanium Aluminum Coating●High-Speed Steel●None