Included rear cover-- hole diameter: 6.5mm, it is removable and can be used on different baseholder stand 0 ~ 25.4mm(1 inch) / 0-12.7mm(0.5inch) MeasuringRanges, HighResolution up to 0.001mm (0.0005 Inch/Metric Conversion-- Switchable between metric and inch, Suitable for AllKindof Measurement Large digital display with 3digits, be used to accurately measure small lineardistances in mechanical and industrial processes without reading errors, practical tool for mechanical, industrial processes and laboratory use Elevates your measurement game with this digital Its advanced features makings it essential tool for accurate result, Manufacturer: REITINGE