1/2in Dia Reduced Shank HSS Twist Drill Bit Milling Cutter 21mmcountersink drill bit set router bit set

1、Forged from premium 9341 steel high hardness and good wear resistance. 2、The drilling head is processed by quenching to ensure excellent performance. 3、135°drill point adopts double relief angle design to achieve incisive cutting. 4、38°large spiral angle design increases cutting chip flute. 5、Standard 1/2 inch round shank for convenient and secure use.