Our Diamond Ultra™ Wet Core Bits are engineered using only the top-quality diamonds to provide fastest drilling and maximum run time. The thin kerf, segmented diamond rim and laser weld allow for faster holes in concrete, rebar, and even solid steel. These core bits deliver up to 20% longer run-time vs. our previous generation of wet core bits. The Milwaukee® Diamond Ultra™ Wet Core Bits are designed for use with MX FUEL™ Core Drills and corded core drills for maximum versatility. The Diamond Ultra™ Core Drill Bit sizes range from 5/8” to 14” to meet all your needs when drilling into even the toughest materials. Sizes from 5/8” – 1-1/2” are compatible with all core drills with a 5/8”-11 thread. Sizes from 2” – 14” are compatible with all core drills with a 1-1/4”-7 thread. Designed for wet use only.