Product Description: Root Head 008 Head Size - 008 Cutting Length - 4.0 mm Shank Length - 30 mm Package contains 3 pieces of sterilizable drills. These 30 mm drills are suitable for surgical use and are not compatible with all high-speed drilling tools and may void the tool's warranty. Please check the technical data of the tool you are using or consult iM3 regarding the use of surgical drills. These drills are designed for single use, and the cost has been accounted for in each procedure.