Precision Twist Drill H.S.S. 6″ Long Aircraft Extension Drill, #4 Size, 2-1/2″ Flute Length

• H.S.S. – High Speed Steel
• Hardness: 58 to 60 RC
• Drill Point Angle: 135
• Point Sharpening Type:Split Point
• Drill Type: Aircraft Extension
• Overall Length: 6″
• Access hard-to-reach locations
• For general purpose deep drilling in normal steels, cast iron, and a variety of other ferrous and non-ferrous metals and alloys.
• Right hand (clockwise rotation) cutting direction.
• Standard two flute design.
• Normal spiral – helical flutes.
• Cylindrically ground.
• Workpiece Material Range: Steel, Non-Ferrous, Cast Iron, Plastics

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