RTec chisels deliver up to 30% faster material removal than other models due to a design that reflects any rebound energy from the work area to the chisel's tip rather than to the tool user's grip. More breakout energy is applied to the work area, causing greater material removal. The self-sharpening chisels can be used for up to 100 hours without replacement. The tool comes in two styles: a twisted head, which minimizes jamming and has a wider material removal footprint; and a power rib design that creates both vertical and lateral cracks. Bosch Power Tools & Accessories. 877-267-2499. www.boschtools.com