Traderight Diamond Core Drill Bit 152mmDESCRIPTIONNeed to put a nice round hole in a wall? What about all the way through a cinder block or brick wall? Your diamond core drill bit is the exact part you need. How to drill a round hole. Drill a guide hole with your masonry bit. Connect your diamond core drill bit to the auger. Insert the guide bit. Drill for a few centimetres. Remove the guide bit. Finish off the hole. Always wear gloves and put on safety glasses before drilling. If your