Reinsman Western D-ring snaffle. 7/16" thick smooth sweet iron mouthpiece. 3" rings, 5" mouth.
 
"The Dee ring applies pressure to the horse's cheek on the opposite side of the face from the rein you pull to allow better flexion. Coupled with this larger, smooth mouthpiece makes this bit one of our most popular. Sweet iron is intended to rust and promotes salivation which makes a more supple feeling."