Dry Core Bits - X300 - Masonry

Designed for HVAC installers boring through cinder block and brick veneer for ductwork and refrigerant lines, this 4-inch dry core bit handles masonry drilling without water hookup requirements. The .125-inch wall thickness provides structural integrity during extended cuts while the 5/8-11 thread attachment fits standard angle grinders and core drill rigs. Diamond Vantage engineers this bit for dry operation, eliminating slurry cleanup on interior jobs where water containment creates complications. The X300 series cuts through concrete block, brick, and stone at consistent depths without frequent bit changes. Part number 04012H2DH delivers reliable performance across residential and light commercial drilling applications. Built for masons, electricians, and plumbers running penetrations through masonry walls where portability and quick setup matter more than high-volume production work.