Ecobust USA EB244 Type 2 Power Drill, Pack of 4 (Package May Vary) The fastest, most powerful and economical of its kind. 3 EASY Steps, Drill, Mix, Pour and watch it crack! No Vibration, No Noise, No Dust! A safe, powdered mixture with only the addition of water expands at an incredible force being able to break any strength of rock or concrete. Reduce labor costs, increase productivity, and savee time. Perfect for noise, vibration, or dust restrictions. Ideal for breaking boulders, concrete slabs, reinforced concrete, beams, pillars, retaining walls, driveways, patios and more. Top Award winning product Rock Breaking Concrete Cutting Excavation