5pcs 3.9mm HSS Twist Drill, High Speed Steel 6542 Black Oxide Drill Bit with Straight Shank to Cut Through Stainless Steel, General Steel, Cast Iron, Wood, Plastic.
- High Quality Material Selection, Stable Performance, High-Quality High-Speed Steel Milling And Forming, The Overall Vacuum Heat Treatment, Special Grinding Edge On The Head, Good Positioning, Sharp And Durable Drill Bit..
- With High Coaxiality And Overall Grinding, The Grinding Drill Bit Is Better Than The Rolling Drill In Both Accuracy And Life, Especially The Toughness Is Increased Several Times, And It Is Not Easy To Break During High Strength Machining..
- Flutes Form - 2 Flutes Form Helps Clear Chips And Debris Away From The Bit, Decreasing Friction And Heat For A Faster, Cooler Drilling Process, Chatter-Free Design With Staggered Cutting Teeth Ensure The Precise Countersinking And Hole Smooth Clean..
- Straight Shank And 135° Point Angle - Straight Shank For Standard Drill Chucks And Collet Chuck To Hold Firmly, Assuring Accurate Centering.
- Helical Flute For Swarf To Easily Get Out.
- Ideal For General Purpose Drilling Applications..
- Carburizing And Quenching Process Is Adopted With High Surface Hardness, Strong Fatigue Resistance, Higher Efficiency And Long Service Life.Especially Suitable For Aluminium Alloy, Iron, Plastic, Iron, Wood, 201 Stainless Steel..