Review on Industrial Masonry Drill Bits Set: Optimize Your Search by Chris Wheeler

First of all, these drills allow me to get the job done... just a little. They are used once or twice and then thrown away. The bits are NOT hardened enough to last long. When drilling the top facing brick of a concrete block wall, these bits wore out quickly. All of these bits were used, from the smallest pilot hole to the largest, to insert the 1/4" lever screw. Four holes were drilled in all, and by the end of the drilling, the last hole of 3/4+ of these bits was simply worn out and didn't more usable.Secondly for the low price I had to pay I won't complain.The bits did the job they were made for and should be considered consumable after use.