Features Will handle a wide variety of measurements impossible to obtain with regular micrometers Rigid one-piece frame of drop forged steel Extremely hard and stable one-piece spindle Micro-lapped measuring faces Starrett satin chrome finish - no glare - resists rust Advanced sleeve design with staggered lines and distinct figures for precise and easy readability Ring-type knurled lock nut for quick and sure locking Two hardened anvils furnished - round anvil approximately .120" diameter (3mm) and flat anvil approximately .125" (3mm) and .060" (1.5mm) thick Interchangeable anvils are rigidly held in the vise type frame and quickly interchanged by a single lock screw adjustment Specifications Made in America: Yes Micrometer Type: Multi-Anvil Micrometer Range (in): 0-1" Graduations (in): .001" Anvil/Spindle Material: Steel Anvil Type: Round and Flat Spindle Type: Flat Lock Nut Type: Knurled Ring Type Thimble Type: Ratchet