Standard Pack = 1 piece(s). Type = Digital Micrometer Head ; Range = 0 To 1 Inch ; Spindle End = Spherical ; Stem = Clamp Nut ; Accuracy = +/-2 ?m ; Digital Step = 0.001 MM ; Fixture Thickness For Clamp Nut = 11.5 MM ; Measuring Spindle = 6.35 MM ; Power Supply = Battery SR-44 ; Battery Life = 2.4 Years ; Display = LCD ; Function Lock = Yes ; Data Output = Yes ; Comes With = Digimatic ;