Features: Digital display for the cross slide and the compound tool rest to replace the standard graduated scales. These LCD units improve accuracy, save reading time and minimize errors. Imperial or Metric readings may be selected and the reading can be zeroed at any point. Three decimal place (Metric) and four decimal place (Imperial) displays with an accuracies of � 0.025mm/0.001IN . Supplied with LR44 batteries.Specifications: Model No: SM3002DFD Specification Table: Description: Digital Feed Display Application(s): Lathe/Mill/Drill SM2503: - Lathe SM3002: Yes Specification: Metric Display: 3 Decimal Places Imperial Display: 4 Decimal Places Accuracy: � 0.025mm/0.001" Battery: LR44 - 1.5V Alkaline Height: 325 Width: 234 Length: 92