Mitutoyo 103-260-99 Outside Micrometer, Baked-enamel Finish, Ratchet Stop, 0-1" Range, 0.0001" Graduation, +/-0.0001" Accuracy Vernier scale in inch units for taking precise outside diameter (OD) measurements Ratchet-stop mechanism helps provide uniform pressure for precise, repeatable measurements Baked enamel finish for protection and durability of frame Satin chrome finish on thimble and sleeve helps resist rust and reduce glare Carbide facing on spindle and anvil provides wear resistance