taper shank twist drill bits
Taper shank twist drills are made of high-speed tool steel, strictly according to the national standards Taper shank twist drills are made of high-speed tool steel, strictly according to the national standards,including general, long, lengthened and extra-long taper shank twist drills,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.
taper shank twist drill bits
