core drilling bits What are the different types of drill bit used

Common core drills bits, probably divided into rolling twist, the whole ground drilling, divided into straight shank drills, taper shank drill, 1/2, etc. shank drill, drill-headed, single-head short Drilling Tools, center drill, hex shank drill , hammer drill, impact drill, etc., the material also can be roughly divided, 4241 #, 4341 #, 9341 #, 6542 #, M35, M42, alloys.