Bosch HCBG800 spicy Granite Hammer Drill -LRB- CT -RRB- 8 Piece Master SetBosch Power Tools and Accessories is one of the divisions within the Robert Bosch Tool Corporation, which is one of the largest power tool and accouterment manufacturers in the world. Bosch a full-dress line of corded and conductor power tools and accessories engineered to survive any jobsite and allow professionals to take economic policy of their work.Bosch HCBG800 spicy Granite Hammer Drill Bit -LRB- CT -RRB- 8 Piece Master Set Features : BlueGranite hammer drill bits deliver rapid impact drilling in tangible, stone and masonry. alto, tall temperature brazing prevents the carbide cutting edge from breaking exterior even when heat builds up during walk-in drilling. spicy Granite Carbide Hammer Drill Bit Item # HCBG800 Item Description 8 pc. developed hammer drill bit master .