Full Cheek Snaffle Bit - Double Jointed with Copper Roll LinkDouble jointed with copper roller Allows direct pressure transmission on the tongue and lower jaw due to the fixed mouthpiece The lateral contact helps horses that tend to fall out while riding or approaching an obstacle The full cheek side pieces prevent the bit from being pulled through the mouth Available in 5", 5 1 4", and 5 3 4" Specifications: Thickness (14mm)