Features Specifications:HSS Twist Drill Bits,ASME B.94.11M-Screw Machine Length, Fully Ground.  ASME B.94.1--Screw Machine Length Twist Drill Bits Manufacturing process: rolled, milled, fully ground Point angle: 118 or 135 split point Flute type: N Material: HSS or HSS-Co Finish: White,TIN Coated,Rainbow Color,Bright,Black & Bright,Zirconium Coating,Black,Coffee Color, etc. Diameter: 1-20mm Item No.:TY-H025 Kindly contact with us for more information, we'll reply you in two working days, many Thanks