Shires loose rings discourage the horse from leaning on the bit whilst the lozenge softens the contact and the copper helps encourage mouthing.
Mouthpiece thickness: 16mm. Cheek height: 65mm.
Stainless steel is the most common material for bits. Durable, easy to clean, tasteless and does not rust. C
opper is used in the mouthpiece, creating warmth and encouraging salivation to keep the mouth soft.