BGTEC Dry Diamond Drill Bits 5pcs 1/4" with Quick Change Hex Shank for Granite Marble Porcelain Tile CeramicSupply

diameter 6mm 1/4 Inch, diamond length 10mm ,Hex Shank Quick-fit

Multi-purpose drilling for granite & marble, masonry, concrete, tile/ceramic, stone

Wax inside for cooling,our Diamond Tipped Drill Bits have wax cores built-in which automatically absorb and dissipate heat as you go

Dry drilling and Use water for longer time.Notice:Please use with water when drilling granite

Vacuum Brazed diamond technology provide very high efficiency,cuts faster and lasts longer. Diamond material upgraded, can drill 10-15 more holes than ordinary drill bits

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