... with good quality & resonable price We produce all kinds of HSS twist drill bits, the details include:1) Standard: DIN338, DIN1897, DIN340, ISO235 ... , ANSI B94. 11M, DIN345, DIN 18702) Material::HSS 4241, HSS 4341, HSS 9341, M2 (6542), M35,3) Manufactory process: roll forged ...