... 1. Material: High speed steel2. Process:Roll forged,Edge ground,Fully ground,Milled3. Point angle: 118degree,135 degree split point4. ... 1/2 shank drills,Wood working drill bits, Flat wood boring bitApplication:1.drill cast steel2.malleable iron3.sintered metal4. ... non-ferrous metals5. wood and so on taper shank drill bit