Fast printing keyring ruler

It's compact ruler with option to attach to keys. It has a small space inside to install RFID sticker tag.

Printed on MK4S without MMU. I do recomend to print in two colors for better contrast. It prints around 15min at 0.2mm layer, so it's super fast.

If you want to insert RFID sticker, I do recommend to stop printing at 0.8mm and then place a sticker. If you don't want to, just print as usual.