Our diamond ultra wet core bits are engineered with thin kerf segments to provide you with the fastest drilling in reinforced concrete applications. Our diamond ultra wet core bits deliver up to 20% longer runtime vs our previous generation of wet core bits. Milwaukee wet core bits are specifically designed for use with our MX FUEL core drill and corded core drills for maximum versatility. Our concrete core drill bit sizes range from 5/8 to 8 in to meet all your needs when drilling into concrete with rebar.