Bosch HS1915 Scraping Tile Chisel Drill Bit, 2" x 12""BOSCH" TILE CHISEL DRILL BIT The R Tec Advantage: Bosch R Tec technology for SDS max chisels use an energy diverting reflection element that increases material removal by 15%. Because the energy is dispersed back into the work material, the tool and bit do more of the work with less vibration for the user. And the R Tec chisel features a unique cutting head with extra wedges for increased breakout. Bosch SDS max R Tec chisels and points produce