Teclock Dial Indicator Features Include... Thread size: M2.5 Meets or exceeds federal specifications. Easy reading dial with crisp graduations. Interchangeable hardened chrome point. Hard satin-chrome finish. Hard chrome plated stem, precision ground and tapped. Technical Data.. Measuring Range: 1mm Dial Reading: 0-100 Graduation: 0.001mm Dial Diameter: 2-13/64" AGD: 2 Revolution Counter: Yes Dial Color: White Back Type: Lug