Pro Roper-2" Ported Chain with Copper Roller 7" Cheeks, 5 _" Mouth. The Pro Roper's Antique with German Silver cheek is hard for any rider to resist! The 7" medium cheek with a Ôno pinch' ball hinge is stylish and has good control. The 2" Sweet Iron Ported Chain Mouth with Copper Roller adds tongue pressure and feel for the horse that cues well off the bit. The roller helps to pacify the nervous horse. This bit will provide lift in the head and shoulders and encourage hock engagement. An excellent bit for timed events. Copper is a soft metal, check for signs of wear before each use.