Features Quick and easy adjustment Advanced sleeve design with staggered lines and distinct figures for precise, easy readability Balanced frame design for comfortable, accurate measuring Quick-reading figures - every thousandth numbered on inch tools No glare Starrett satin chrome finish One-piece frame of drop forged steel Extremely hard and stable one-piece spindle Ring-type knurled lock nut for quick and sure locking Combination ratchet and speeder for uniform pressure and quick adjustment Micro-lapped carbide measuring faces Specifications Made in America: Yes Micrometer Type: Hub Micrometer Range (in): 0-1" Graduations (in): .001" Anvil/Spindle Material: Carbide Anvil Type: Flat Spindle Type: Flat Lock Nut Type: Knurled Ring Type Thimble Type: Ratchet