Reinsman junior cowhorse bit. 5" cheeks with 5" mouth. 3/8" 3 piece sweet iron mouthpiece with copper roller.
 
"Extremely good bit if you need help getting your horse's legs underneath him and his hind end down. Mouthpiece breaks over the bars at an angle to contact new nerves and add some tongue pressure for better control. Copper roller often pacifies a nervous horse and adds slight tongue pressure for better headset."