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We produce all kinds of HSS twist drill bits, the details include: 1. Standard: DIN345 2. Material: HSS4241, HSS4341, HSS9341, M2 (6542), M35 3. Process: Rolling, Milled 4. Point angle: 118degree, 135 degree split point 5. Surface finished: Bright finished, black oxide, black flute&bright shank, TIN coated 6. Shank: Straight shank drills, Taper shank drills, 1/2 shank drill 7. Size: 6. -100 MM 8. Hardness: 62-66 HRC