Stainless steel Solid Carbide Drills

HRC50 Stainless steel Solid Carbide Drills Bit with 25 Degree Helix angle Quick Detail: 0.6-0.8um Mirco grain size solid carbide rod TIALN Coating (Black), Made by 5 AXIS CNC grinder Checked by Zoller Inspection Equipment Workpiece upto HRC50 1 piece packing. Standard Length Type Helix Angle:25 Description: Micro Grain Szie 0.6-0.8um, Wc carbide rod with high tenacity,with high quality TiAlN coating,getting long tool life,high precision spotting,reduce time of changing