The Diamond Premium Wet Core Bits are designed to the highest standards, only using quality diamonds. Available in sizes 159mm (6-1/4") - 356mm (14"), Diamond Premium Wet Core Bits offer exceptional drilling life and speed in cured concrete with hard aggregate and medium steel reinforcement. Designed with a threaded cap for easily extending the core bit. Designed for use with MX FUEL™ Core Drills and corded core drills for maximum versatility and are compatible with all core drills with a 1-1/4”-7 thread. Designed for wet use only.