Features: Engineered with high strength brazed diamonds grit, this M14 threaded hole opener delivers excellent durability and accuracy drilling on porcelain, marble, glass, and ceramic surfaces. The standardized M14 thread ensures quick compatibilities with most power tool, while its advanced dry drilling design eliminates water cooling requirements for flexible operations. Ideal for professional tilers, contractors, and craft enthusiasts seeking efficient performances in demanding stone fabrication or renovation projects. Perfect for creating clean openings in countertops, tile, and glass panels during bathroom installations, kitchen upgrades, or commercial construction tasks. Choose from multiple diameter options to achieve unflawed cut with reduced materials chipping, backed by wear resistant carbides construction for extended tool life. Specifications: Materials: Alloy Diameter: 6mm/8mm/10mm/12mm/20mm/25mm/32mm/35mm/40mm/45mm/50mm/68mm(Optional) Package Includes: 1Pc Hole Opener note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.