5pcs fully ground HSS twist drill bits black oxide
5pcs fully ground HSS twist drill bits black oxide surface
The 135 degree split point of the HSS drill bits starts on contact in all types of metal, no walking or skating.
Fully ground drill bits body, black oxide for the most accurate hole dimensions and high concentricity.
Hardened high speed steel body for the drill bits, which can provide addtional safeguard.
5pcs fully ground HSS twist drill bits set
Black oxide surface
Fully groudn body
Plastic box package