Mitutoyo DTI 0.14mm x 0.001mm Basic Set Nailers & Braders Made from M2 HSS Steam Made from M2 HSS Steam Tempered finish for general purposeHSS twist drill that is tough and precise for drilling alloyed 6mm to 12mm Dia Dial reading 0 70 0Designed to probe surfaces that cannot be reached with a normal dial gauge Useful for both alignment and for measurement purposes Mitutoyo proprietary new design permits smooth pointer operation Flat crystal makes graduations easy to read Strong frame provides excellent rigidity and durability Non magnetic pointer and contact point permit reliable operation even in magnetic environments Clear and concise wide dial face allows excellent visibility The surface of the crystal is hard coated for excellent scratch resistance O ring protection guarding against oil and water penetration