0 to 1 inch Range mechanical outside micrometer Accurate to 0.0001" with 0.0001" graduations Carbide tipped measuring face and painted steel frame for durability Short form calibration certificate and fitted case included SPI 0 to 1 inch Range mechanical outside micrometer with ratchet stop and spindle lock. Accurate to 0.0001" with 0.0001" graduations. Carbide tipped measuring face and painted steel frame for durability. Short form calibration certificate and fitted case included.