High hardness, rustproof, solid and durable high-speed steel in Quick-change 1/4"(6.35mm) Hex Shank
Complete hole drilling, tapping, deburring and countersinking in one operation save processing steps and time costs, improve working efficiency.
Self-Centering point, do not need assistant center drilling or center punching.
Ideal for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc.
Back tapered beyond tap to prevent thread damage from over-drilling