1>We use all desired grades of Quality speed steels as per standards taper Twist Drills drill bit 2>our quality is the best.

including general, long, lengthened and extra-long taper shank twist drills,which can meet the requirements of different types of machines' processing,the products quality and their long life-span have been keeping ahead in the tool-making industry which make them the strongest products of the company.

Executive standard:GB/T1438.1-1996, GB/T17984-2000,DIN338,DIN340...

Finishing Color:Black

Material:Hss-9341,6542,4341,4241..

DIN345 Taper Twist Drills drill