This dry core bit is the ideal choice when drilling horizontally through softer masonry where water slurry cleanup is difficult or prohibited. This is commonly used for: running 5-inch stove pipes or ductwork through brick; installing large electrical conduit through cinder block; venting dryer lines through exterior masonry walls; and creating utility penetrations in finished basements. For vertical drilling or cutting through hard, steel-reinforced concrete, a wet core bit is a much faster and more durable option. Rent a Diamond Core Drill, Hand-Held