Silverline Tools - TCT Masonry Circular Cutter - 77mm Dia For drilling into brick, breeze block and concrete block (max 45 Newtons) Use with square hole cutter to form recesses for electrical back boxes Suitable guide hole must be pre-drilled. <a href="https://www.amazon.com/b?node=14770868011"> International products </a> have <a href="https://www.amazon.com/gp/help/customer/display.html/ref=nav_cs_help?ie=UTF8&nodeId=202045290"> separate terms, </a> are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Manufacturer warranty may not apply <a href="https://www.amazon.com/b?node=14770868011">Learn more</a> about Amazon Global Store.