1Pcs 1/2 inch Dia Reduced Shank HSS Twist Drill Bit with a Storage Box (15.5mm)

1、Adopted of 9341 high-quality steel forging and head is treated by quenching which is high hardness and good wear resistance 2、135°Double back Angle design design makes cutting sharp 3、38°big spiral Angle design increasing the chip cutting groove 4、Standard 1/2 inch round shank for wide applicability 5、Multiple drilling diameter is available