Detailed Product Description drill setsWe produce all kinds of hss twist drill bitThe material as hss 4241#, hss 4341#, hss9341#, M2, M35 and so onThe process can be provided as: Roll forged,Edge ground,Fully Ground,Milled118 and 135 degree point angle design for general purposesurface finished: Bright finished, black oxide, tin oxide,Black flute & bright shank, rainbow.drill bit can be divided ...