Standard Pack = 1 piece(s). Type = Digital Micrometer Head ; Range = 0 - 1 Inch ; Graduation = 0.0001 Inch ; Overall Length = 5.25 Inch ; Mounting Shoulder Diameter = 0.625 Inch ; Mounting Shoulder Length = 0.670 Inch ; Spindle Diameter = 0.256 Inch ; Features = Sharp Microfine Graduations On A Satin Chrome Finish, Spindle Is Hardened And Precision Ground Of Special Steel; Spindle Face Microlap Finished. Measuring Faces Are Carbide Tipped, Thimble And Sleeve Are Satin Chrome Finished. Zero Adjustment On The Sleeve, Meets Or Exceeds Federal Accuracy Specs ;