BlueGranite hammer drill bits deliver fast impact drilling in concrete, stone and masonry. Low voltage, high temperature brazing prevents the carbide cutting edge from breaking out even when heat builds up during deep drilling. 15 percent faster in concrete (compared to S4L) Optimized brazing and hardening process for long life Brute Tough Includes: (1) 5/32 x 4 in. x 6 in., (1) 3/16 in. x 4 in. x 6 in., (1) 1/4 in. x 2 in. x 4 in., (1) 3/8 in. x 4 in. x 6 in., (1) flat chisel, (1) point chisel in.