Good Durability: Adopted of 9341 high-quality steel forging, and head is treated by quenching, which is high hardness and good wear resistance
High Efficiency: 135°Double back Angle design design makes cutting sharp
Angle Design: 38°big spiral Angle design, increasing the chip cutting groove
Widely Applications: Standard 1/2 inch round shank for wide applicability
Multiple Usage: Multiple drilling diameter is available