The most popular precision micrometers used by skilled workmen worldwide Accurate, rugged, and easy to use Protective case keeps micrometers and standards together, readily accessible Hard and stable one-piece friction thimble permits one-hand operation of micrometer and uniform contact pressure Balanced frame and thimble design ensure easy handling Micro-lapped measuring faces Starrett No-glare satin chrome finish on thimble and sleeve minimizes annoying surface glare under bright lights and resists rust Anvils sized at .250" (6.35mm) diameter.Includes:Case