Viking H.S.S. 6″ Long Aircraft Extension Twist Drill, 5/16″ Size, 3-3/16″ Flute Length

• H.S.S. – High Speed Steel
• Hardness: 58 to 60 RC
• Drill Point Angle: 135
• Flute Shape: Spiral Flute
• No. of Flutes: 2
• Black oxide treatment prevents chip welding & increases abrasion resistance.
• For deep hole drilling applications.
• Solid construction.
• Shank Style: Straight Shank
• Package quantity: 6 pieces
• Series: 211
• Workpiece Material Range: Steel, Non-Ferrous, Cast Iron, Plastics
• Country of Origin: U.S.A.