Hitachi 725856 2-Inch Quick Change Core Bit for Hardie Siding, Abrasive Materials and Wood and Nail 2-inch fiber cement hole saw Made of carbon-hardened steel with (6) carbide tips Can be used with a variety of shanks for flexible and economical use of the system For use with drills hammer drills and rotary hammers in fiber cement and nail embedded wood Comes with a 30-day limited warranty High Quality Carbon Hardened Steel High Tolerance milled shank provides perfect fit CNC Controlled manufacturing ensures 100% quality consistency