China
联系人 Ms. Maggie
Dinmao, Zhenjiang, Jiangsu
hss straight shank twist drill bits
different standards:
din**8, din**0, din***7,
jobber length, taper length, screw machine length
fully ground, polished,roll forged
different hss material: M*5,M2,W9,W4
**5 degree split point, **8 degree
