Features The most popular precision micrometers used by skilled workmen worldwide Accurate, rugged, and easy to use Starrett satin chrome finish - no glare - resists rust Advanced sleeve design with staggered lines and distinct figures for precise and easy readability Balanced frame and thimble design ensure easy handling Gracefully designed tapered frame for use in narrow slots and tight places Quick and easy adjustment Micro-lapped measuring faces Extremely hard and stable one-piece spindle Specifications 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