Features and Benefits: ?Fastest drilling compared to previous Milwaukee dry core bits. ?Delivers up to 20% longer run-time versus the previous generation of core bits. ?Fastest drilling in concrete, brick, and block applications. ?Diamond Ultra Dry Core Bits are engineered with thin kerf segments to provide the fastest drilling compared to previous Milwaukee dry core bits. ?Segments designed with top quality diamonds ?1-1/4″-7 Thread Connection for easy no-adapter use in the MX FUEL? Core Dril ?Designed to be used dry ?13″ Drilling depth The MILWAUKEE? 2″ Diamond Ultra Dry Core Bits are engineered with thin kerf segments to provide the fastest drilling in concrete, brick and block applications. These diamond core drill bits deliver up to 20% longer run-time versus the previous generation of dry core bits. The diamond dry core bits are specifically designed for use with the MX FUEL? Core Drill and corded core drills. The Ultra Dry Core Bits feature a 13″ drilling depth and 1-1/4″-7 thread connection for easy no-adapter use in the MX FUEL? Core Drill.