... , 4341, 9341, 6542, M2, M35 and M42 Twist Drill set.Materials: F4341, 4341, 9341, 6542, M2, M35 and M42 Surface ... titanium nitride coating Manufacturing process: roll forged, milled and full ground Size: 1.0 to 10.0 x 0.5mm OEM ... , auger bits sets, or another drill sets, please contact with us directly, and we'll reply you in 2 working days. Twist Drill Set