Correction w/copper rollers.The Pro Correction is a nice choice to keep horses on the bit and to remind them to break at the poll. This mouthpiece applies pressure directly to the palate and bars of the mouth. The 3 piece action breaks over the bars of the mouth at an angle while rotating the correction port, offering some tongue relief. Larger copper rollers help pacify nervous horses while promoting salivation. Made of stainless steel. Larger D rings with hooks to offer