Chain port, sweet iron mouthpiece with silver engraved cheek pieces is good for stiff ponies who need whoa and bend. Chain port mouthpiece forms to the mouth creating comfortable control while longer cheeks encourage ponies to collect and use their hind end. 
 
4.5" mouthpiece
6.75" cheek pieces
 
*For pony bits to function properly, it's extremely important to have a headstall and a leather or chain curb that fit correctly.