This is a used 3-piece loose ring snaffle bit with a copper mouthpiece.  It has a nice ergonomic curve to the mouthpiece and a gentle lozenge to make it comfortable to your horse.  The copper is a little heavier than most bits and it gives a pleasant taste.  The loose rings are a classic cheekpiece which give an instant release for clear communication.  This used bit shows shallow tooth marks but they are not deep or sharp, and the copper is slightly patinaed.  Too small for my horse.