Shires Brass Alloy Training Bit Loose Ring Snaffle 18mm Mouthpiece. The Training bit is a double jointed bit that acts on the tongue and the bars of the mouth. The double joint eliminates the nutcracker and palate action of a single jointed bit and instead applies pressure to the horse\\\'s tongue. The Loose Ring Snaffle is ideal for horses with a tendency to lean on the rein; the loose rings of the bit provide more movement than a fixed cheek bit and allow the rider to move the bit more in the horses mouth preventing the horse from leaning and grabbing hold of the bit as easily. The Shires Bit is made with a brass alloy to produce a more palatable bit that is warmer in the mouth than stainless steel for the horse and helps to encourage acceptance and salivation. Copper is alloyed with brass to produce a durable metal bit.