Standard Pack = 1 piece(s). Type = Blade Micrometer ; Range = 3 - 4 Inch ; Graduation = 0.0001 Inch ; Accuracy = 0.0002 Inch ; Blade Thickness = 0.030 Inch ; Blade Width = 0.256 Inch ; Blade Penetration = 0.315 Inch ; Features = Hammertone Blue Baked Enamel Frame, Microfine Graduations On Satin Chrome Finish For Easy Reading, Anvil & Spindle Hardened & Precision Ground With Microlap Finish On Ends. Spindle Thread Is Hardened, Ground And Lapped, Non-Rotating Spindle, Ratchet Thimble, Wrench Included For Quick And Easy Zero Adjustment On Sleeve, Sizes Over 1 Inch Include A Standard, Includes Case ;