200mm Practical Handle Square Shank Spiral Electric Hammer Drill Bit
- 1.Twin spiral, drilling efficiency, high precision.
- 2.Shank, matching with electric hammer perfectly.
- 3.With the 4-flute design, the drill bits removes debris quite efficiently.
- 4.High temperature quenching process,high hardness.
- 5.Straight shank design is more suitable for many electric drills and drilling machines.
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