From the Manufacturer
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.
Product Description
3/8" x 6" Blue Granite Hammer Drill Bit delivers 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. 5 per pack.