Standard Pack = 1 piece(s). Type = Premium Depth Micrometer ; Range = 0 To 12 Inch ; Graduation = 0.001 Inch ; Accuracy = 0.00028 Inch ; Base Size = 2.5 Inch ; Features = Clear Microfine Graduations On Satin Chrome Finish, Quick And Easy Zero Adjustment, Rods Hardened, Ground And Lapped On Measuring Surfaces And Adjustable In Either Direction, Interchangeable Rods Are Fitted To The Micrometer Spindle Against A Positive Stop And Locked, Ratchet Thimble, Threads Hardened, Ground And Lapped For Accuracy, Base Constructed Of Hardened Tool Steel Is Precision Ground And Microlapped ;