/ Precision Measuring Tools / Precision Hand Tools / Micrometers / Micrometer Heads / 663RL * Not actual product image 52773 663RL Heavy Duty Micrometer Head 52773 Other similar products The Starrett 663 Heavy Duty Micrometer Head includes 0-1" range, ratchet stop, lock nut, and .001" graduation. 0-1” Range, .001” Grad, Ratchet Stop, Lock Nut. 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 (in): 0-1" Graduations (in): .001" Spindle Material: Steel Lock Nut Type: Ring Type Knurled Spindle Type: Flat Thimble Type: Ratchet Accuracy (in): +/-.0001"