We recommend this set, which is more affordable and easy to carry
M14 Thread Brazed Diamond Core Drilling Bit Hole Saw Ceramic Tile Granite Marble Hole Opener Tools SDCHNESC Brazed Dry Drill Bit
Specifications:
Diameter: 25mm,30mm,35mm,40mm,45mm,50mm,68mm
Total Height: 60mm
Diamond Height: 10mm
Working Depth:30mm
Thread:M14 Thread
Machine:Angle Grinder
Features:
The new design from the SDCHNESC factory uses a Great Wall shaped cutter head design, which is sharper and lasts longer than normal cutter heads.
Dry drilling without water feeding, it’s easier to use. In the hole opening work less chips, less damage, less heat, good quality of finished products.
Wide application for drilling tile ceramic、 granite、 marble stone etc. Standard M14 thread design, quick and easy to install, with the adapter can be used for electric hammer, hand drill and other equipment, save your money.

You can see in the picture the tool head after 30 consecutive holes on marble and high hardness tiles























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