Magnetic back for dial indiactor

This part replaces the back cover on a dial indicator and has holes for four 0.3 in. x 0.11 in. (8mm x 3mm) Neodymium Rare-Earth Magnets. This allows you to stick the indicator to the bed and use it as a "DRO" of sorts when boring, etc.
The magnets can be purchased at Home Depot and come in a 10 pack. (SKU #631954) The four mounting holes for the cover screws are quite small and, depending on your printer, may need to be drilled out to the correct size in post-processing. The holes for the magnets are a little undersized so the magnets can be pressed in place rather than glued.