This tool is used to clean between the chainrings in the rear cassette in a multi gear bike. it is thin enough to clean 9, 10, 11 or 12 speed cassettes. I mostly use this after mountain biking sessions where debris like grass will get trapped between the chainrings making it hard for the chain to make full contact with the teeth in the chainring. Slide between the chainrings while spinning the chainring. Works great for cleaning between the rings.
.20 to .07 with layer editing
made the top layer of the teeth around 2mm and the top layer of the handle about3.8mm much higher resolution using the layer editing tool in Slic3r.
Designed in fusion 360
Very simple design, messed around with the teeth angle after a few test prints. Switch filament color to make the letters stand out.