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The absolute problem solver for the hardest porcelain gres tiles up to Mohs / Ritz hardness grade 9 as well as glass and porcelain. Universal use by operation in all standard drills. The patented tungsten carbide tip with center cutting geometry allows precise placement and accurate holes without chipping. No cooling required, thus easier handling. The special ground tip enables low-wear drilling and very long service life of the special drill bit. High stability due to reinforced shank diameter. The white color ring marks the ideal drilling depth.