Features Rugged construction and extremely attractive design For craftsmen who want a precision micrometer with a distinctive Starrett design and finish Strong ribbed frame with smooth black enamel finish and polished steel ribs and hub Starrett No-glare satin chrome finish on thimble and sleeve minimizes annoying surface glare under bright lights and resists rust Advanced sleeve design with staggered lines and distinct figures for precise and easy readability Extremely hard and stable one-piece spindle Micro-lapped measuring faces Quick-reading figures - every thousandth numbered on inch tools Specifications Made in America: Yes Micrometer Type: Outside Range (mm): 25-50mm Graduations (mm): 0.001mm Anvil/Spindle Material: Carbide Anvil Type: Flat Spindle Type: Flat Lock Nut Type: Knurled Ring Type Thimble Type: Ratchet Accuracy (mm): +/-.002mm