edge ground twist drill bit 1.material: high speed steel 2.drilling in steel,cast steel,malleable iron,non-ferrous metal etc edge ground twist drill bit1.Manufactured to DIN3382.Material: Hss4341,9341,M2.3.Fully ground from soild material4.135°split point5.For particularly tough or hard metal drilling applications,such as stainless, Cr-Ni and special acid resistand steel