(Diameter 20+27+35+55+68 Drill Bit+Diameter 20mm Diamond Finger Bit+3/8" Hexagon Shank)
1.Less Chipping, Minimizing breakage, less heat generation, Better finish quality
2.Vacuum Brazed technology provides longer working life, Fast and smooth drilling
3.High diamond exposure rate provides a faster and more aggressive drilling
4. Vacuum Brazed technology provide much longer working life than electroplated ones (Generally 3-5times),Save your money and time....
5.Having less loss of material
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