Twisted Stainless Steel Snaffle. The Dee ring applies pressure to the horse's cheek on the opposite side of the face from the rein you pull to allow for better flexion. Mouthpiece can be severe. It will cause the corners of the lip and bar to become tender when used for several days. Excellent schooling/training bit. (NEVER TIE A HORSE IN THIS BIT.) *****LIFETIME GUARANTEE*****