Standard Pack = 1 piece(s). Type = Inside Micrometer ; Range = 4-5 Inch ; Graduation = 0.001 Inch ; Accuracy = 0.00024 Inch ; Anvil And Spindle Are Hardened And Precision Ground With Microlap Finish On Ends, Spindle Thread Hardened, Ground & Lapped, Microfine Graduations (.001 Inch ) On A Satin Chrome Finish Permit Easy Reading, 0