The Colin Miles is a great schooling bit with a 55mm centre piece creating greater tongue pressure. The rings give the horse something to play with and help keep the horses attention on the bit.
A Ring cheek piece introduces poll pressure as well creating leverage on the mouthpiece, the 2 ½ ring version is the softest version of ring bit as the ½ ring softens the leverage on the mouthpiece and poll.
The bits are made from blue sweet iron, because it:
helps bit acceptance
is warm and sweet
Please note the blue will fade with use.