/ Precision Measuring Tools / Precision Hand Tools / Micrometers / Micrometer Heads / 663MRL * Not actual product image 52774 663MRL Heavy Duty Micrometer Head 52774 Other similar products The Starrett 663 Heavy Duty Micrometer Head includes 0-25mm range, lock nut, 0.01mm graduation, ratchet stop, and lock nut. 0-25mm Range, 0.01mm Grad, Ratchet Stop, Lock Nut. Note:This item is discontinued. Please consider the recommended alternative listed above or contact our special order department at (978) 249-3551 x410 for more information. Features Specifications Contact Starrett Features Starrett satin chrome finish – no glare – resists rust on all reading surfaces Advanced sleeve design with staggered lines and distinct figures for precise and easy readability Quick-reading figures Extremely hard and stable one-piece spindle (the heart of our accuracy and long life) Micro-lapped measuring face for flatness and squareness Quick and easy adjustment Specifications Micrometer Type: Mechanical Micrometer Head Range (mm): 0-25mm Graduations (mm): 0.01mm Spindle Material: Steel Lock Nut Type: Ring Type Knurled Spindle Type: Flat Thimble Type: Ratchet Accuracy (mm): +/-.002mm