We love the Shires Sweet Iron Copper Roller Snaffle Bit for the raised copper ribs that help prevent the horse from taking too much hold.
With a sweet iron mouthpiece designed to produce a sweet taste and encourage salivation as it oxidizes. The addition of copper ribs help to prevent the horse from taking to much contact, a good deterrent for horses that tend to take hold. The double jointed mouth with rollers is good for horses with busy mouths.