Stronger Hardness, Abrasion Resistant, Corrosion Resistant. Standard Process. precision drill bits MeterialHSS 4241, HSS 4341, HSS 9341, M2 (6542), M35, ,etc2.standard DIN338, DIN1897, DIN340, DIN1869, DIN341, DIN345, DIN1870, ANSI jobber 3.hardnessdetermine by material4. Shank straight shank drills, taper shank drills, reduce shank drills, 1/2 shank drills, hex shank drills 5. Point angle 118 ...