Spiral Stage Drill LBH521SP LOBSTER

Spiral groove is adopted so the rake angle becomes acute, providing significantly greater sharpness than conventional drills.The blade is subjected to special processing and proprietary polishing, so it has low resistance when used and has excellent sharpness and chip discharge.Work material: Iron plate, wood, plastic, etc.(Do not use on heated metal plates.)Step Width (mm):4.0Number of Stages (stage):9Shank Diameter (mm):6.35Drilling Dimension (?3mm):5, 7, 9, 11, 13, 15, 17, 19, 21Surface Treatment: Titanium CoatingCobalt High Speed SteelNone