Bombers 2½ Colin MilesA Ring cheek piece introduces poll pressure as well creating leverage on the mouthpiece, the 2 Ring version is the softest version of ring bit as the ring softens the leverage on the mouthpiece and poll. The Colin Miles is a great schooling bit with a 55mm center piece creating greater tongue pressure and reducing bar pressure. The rings give the horse something to play with and help keep the horses attention on the bit. This particular joint exerts