Affiliate disclosure: Firebusters may receive a commission if you purchase through sponsored links on this page, at no additional cost to you. Concrete & Masonry Core Drilling Guide BAUMR-AG 152mm Diamond Core Drill Bit The BAUMR-AG TOLBITBMRA152 is a large 152mm diamond core bit with a 1-1/4" UNC threaded connection. It is part of BAUMR-AG's masonry core-bit range and is intended for use with compatible core-drilling equipment rather than a…