For use with masonry, brick, block, & cured concrete. Excellent bits!! They cut aggressively, will last a long time, and are easy on the wallet! There are many diameters for your choice. 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
Core Drill Professional Diamond Core Drill for Concrete
Core Drill Professional Diamond Core Drill for Concrete Ideal for: Concrete, Reinforced Concrete Work applications: Core Drilling / Drill Machine Professional core drill 1″ 1/4 thread for wet use only. For specific drilling of any concrete and reinforced concrete, even the hardest, and granite. Segment height 10 mm: long life. Laser welding: maximum security. Ideal for fast and performing cut for heavy reinforced concrete.