gyroscopic " open-work " keyring collection

A new version of gyroscopic keyring, presented in three " open-work " models, composed by 4 rings, rotating freely in any direction and inseparable.
Each ring has a different design.
Gently move the rings if you want to relax.
The external diameter of the three models is 5 - 4 - 3 cm.
Please use

• file " giro b " for the large model
• file "giro b " scaled at 75 % for the medium model
• file " giro c " for the small model

Have a look to my " The blossoming flower 2 " ( second photo ) at http://www.thingiverse.com/thing:2310167
and " the blossoming flower 1 " ( third photo ) at http://www.thingiverse.com/thing:2290058

Have a look to my other gyro Keyrings

• telescopic " open work " keyring 1 - at http://www.thingiverse.com/thing:2228378
  "supergyroscopic relaxing keyring - 8 rings", at http://www.thingiverse.com/thing:2067014
  "gyroscopic relaxing keyring - 6 rings", at http://www.thingiverse.com/thing:1307100
  “gyroscopic keyring 11”, at http://www.thingiverse.com/thing:1225044
  “gyroscopic keyring with flower 2”, at http://www.thingiverse.com/thing:1149171
  “gyroscopic keyring with flower ”, at http://www.thingiverse.com/thing:1091961
  “gyroscopic keyring with Thingummies”, at http://www.thingiverse.com/thing:879393
  “gyroscopic keyring 2”, at http://www.thingiverse.com/thing:644217
  and in the collection " My gyroscopic keyrings " http://www.thingiverse.com/gianfranco/collections/my-gyroscopic-keyrings