Carbide Outside Micrometer Set .001" Graduation, 12"-24" Measuring RangeThe most popular precision micrometers used by skilled workmen worldwideAccurate, rugged, and easy to useProtective case keeps micrometers and standards together, readily accessibleHard and stable one-piece friction thimble permits one-hand operation of micrometer and uniform contact pressureBalanced frame and thimble design ensure