The Premium Assault Quartzite Core Drill Bit 1-3/8" is engineered for elite performance on the hardest stone surfaces, including quartzite, porcelain, granite, quartz, and engineered stone. Built with a high-performance diamond bond and precision-cut segments, this premium core bit delivers faster drilling, smoother cuts, and exceptional durability under demanding fabrication conditions.
Designed for professional fabricators and installers, the Assault Core Bit provides clean, precise holes with superior stability in both wet and dry applications — making it the go-to choice for high-end countertop and stone fabrication work.
