A set of three hilarious piston keychains designed in a cute, cartoon style. Each piston stands in the same pose but has a different funny facial expression.

These keychains are easy to print, optimized for 2–4 color filament swaps or AMS, and also look great in single-color prints thanks to strong outlines and engraved details.

Perfect as a small gift, workshop decoration, or a funny keyring for your car keys.