Metalab Double Jointed Loose Ring Snaffle Magic System 1The Metalab Magic System double jointed bit is made from stainless steel with a double break. The Magic System effect causes the bit to lock at the joint when the horse resists the rider's seat. The mouthpiece diameter is 17mm. Composition Stainless steel Rinse with clean water after each use until no residue remains. Do not use if the bit shows any defect (damaged, rusty, etc.).