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Diameter 12mm, diamond length 8mm,Round shank
Multi-purpose drilling for granite & marble, masonry, concrete, tile/ceramic, glass, hard plastic,All-Purpose Drilling
Wax inside for cooling,our Diamond Tipped Drill Bits have wax cores built-in for Cooling and Lubrication.Special Designed with Hole and Groove in the Side of Drill Bit for Removing Stone Chips
Dry drilling without water,Use water for longer time
Vacuum Brazed diamond technology provide very high efficiency,cuts faster,durable and sturdy