Ignition key head for ford. I had the body of the key, so I decided to make a full-fledged key. I printed from abs, but you can print from whatever your heart desires. It didn't seem to shrink. Added a detail for centering. I glued the two halves together with glue containing dichloroethane. The chip was sealed with hot glue.

I recommend turning the parts flat so they are facing the table - this way the surfaces to be glued will be more accurate.