Just little tags that you can insert in the unused screw hole in your moki picks if you're using 3d printed handles (I didn't buy the handles from Moki, i printed the model from julienma on MakerWorld). If you find that they're a little too loose, depending on your printer's tolerances, your can stick them on with a little dab of CA glue, just be careful not to glue them to the pick.