This low ported barrel mouth provides plenty of room for the horses tongue to pass underneath, and when engaged does not rotate onto the tongue. The center barrel has limited movement to prevent the bit from scissoring down into the tongue or up into the palate. The copper roller provides some movement helping to pacify the nervous horse. Argentine cheeks offer versatility, hooking reins to the middle rings offers direct rein pressure or moving reins down to the teardrop rings and adding a curb chain provides leverage. Features: Stainless steel cheeks Low port mouth provides space for tongue Pivots at port connection points for more movement Copper inlaid roller gives horse some additional flavor without the risk of pinching Stage B (Transitional - Switching between neck and direct reining) 6" Cheeks 5" Mouth Mouth Diameter: 3/8" Mouth Material: Stainless Steel Mouth Type: 3-Piece, Low Port, Ported, Roller, Roller Barrel, Smooth Port Height: 3/4" Port. Color: Stainless Steel/Copper Size: Horse