The Starrett 226 & 226M Series Outside Micrometer includes measurements at every thousandth of an inch for quick readings. Its no-glare satin chrome finish minimizes annoying surface glare under bright lights indoors or filters out UV light. Its balanced frame and thimble design ensures easy handling and better readability. The rugged frame and hard and stable one-piece thimble provides durability for extended product life. This model includes a 50-75mm measuring range, ratchet stop, lock nut, and 0.001mm graduation. Starrett electronic micrometer guarantees a precise measurement at every position each and every time. 50-75mm, 0.001mm Grad, Carbide Faces, Ratchet Stop, Lock Nut time.