Cordless core drills create deep, large-diameter holes in concrete and masonry to run plumbing lines, HVAC ducts, electrical wires, telecom cables, and more. They rotate round, diamond-tipped bits at high power and high speed, grinding out material around the edge of a hole and leaving the core intact for removal. Coring drills operate in the vertical or horizontal position and are sometimes used to stitch drill overlapping core holes to make long slots and extra-large openings. Pairing a core drill with a stand forms a coring rig that sets the drill in a fixed position to improve control and create consistent holes. Cordless core drills operate in areas without access to wired power and run on brand-specific batteries, which fit different tools from the same manufacturer. Battery series must be compatible with the tool.