For use with masonry, brick, block, & cured concrete. Excellent bits!! They cut aggressively, will last a long time, and are easy on the wallet! All of these bits are 15 long with a 1 1/4-7 thread. It will fit a Milwaukee drill. Not for use with marble or granite 

Construction Concrete Drill   1 Classification: Diamond Core Drill Bit   2 Classification: Construction Core Drill Bit