Bombers Big Ring Gag Control PlateThe Bombers Control Plate is set at 45 to follow the contour of the horses tongue. Consequently, a horse who uses his tongue as a means of pushing against the bit and therefore taking control, will draw back and tuck his chin in, coming back to a better point of control. The mouth piece is made from blue sweet iron, because it: oxidizes easily encourages salivation helps bit acceptance is warm and sweet Please note the blue will fade with use.