A Must Have Bit for High Level Dressage The Stubben Steeltec Double Joint Bradoon Bit is a must have basic bit for all dressage riders. Intended for use with a Weymouth this Bradoon features a sweet copper mouthand a ''french'' link. 4 1/2'' & 4 /34'' bits 11mm thick 5'' - 6'' 14mm. Benefits of Sweet Copper: A sweet copper mouth offers better acceptance because it encourages the horse to chew thus enhances the saliva production. It has a massive copper composition (90 Copper 7 Iron + Aluminum No Nickel) with very high strength (stronger than Argentan). Horses feel good with a sweet copper mouth.