Dewalt d21580k dry diamond drill 2 speed is the ideal tool for electrical plumbing or hvac applications when drilling only into masonry and bricks quick and accurate core drilling into brick and masonry up to 152 mm has a two speed gearbox with mechanical clutch for added user protection features overload and thermal protection increase the life of the tool lock on button for continuous operation when drilling with a stand has a large and comfortable side handle for enhanced user comfort also a