I recently purchased a set of Irwin masonry drill bits from Screwfix. I have drilled 3 holes, starting with a small diameter and then increasing the size in steps. I now have 3 drill bits that are unserviceable totally shot. My problem is my walls are of a concrete construction with lots of small stones. Can anyone advise on suitable drill bits that may last, I am using a standard hammer action drill.
thanks in advance