Spiral Step Drill 101091F 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):5.3, 7, 9, 10.5, 14.5, 18.5, 23.5, 27, 30.5, 34.5, 38.5●Surface Treatment: Titanium Aluminum Coating●High-Speed Steel●None