This is a model of a digital tire depth gauge. It is not meant to be printed. I have included the SketchUp file. The model consists of separate groups for the caliper body, slide and compartment covers. The limits of motion for the slide are marked on its group. This allows the slide to be positioned at any point along its travel.
In order to make the model visible from all sides, I have included an STL file. Because I have an image for the readout, it does not translate into the STL. Do Not Print.