Pelhams work on the poll, corners, bars, tongue and chin groove. This bit will assist with control. The jointed mouthpiece will lessen the nutcracker action. The copper and sweet iron will encourage the horse to be softer in the mouth. Raised copper ribs help to prevent the horse taking too much of a hold. Mouthpiece thickness: 16mm. Cheek height: 135mm. Sweet iron mouthpieces are designed to oxidize to produce a sweet taste which helps with mouthing. The addition of copper to the mouth ensures the horse will not take up too much of a contact, ideal for horses that can take a hold. Stainless steel is used for the cheeks due to it being durable, easy to clean and resistance to rust.