A ring cheek piece introduces poll pressure as well as creating leverage on the mouthpiece, the 2 1/2 Ring version is the softest out of the 3 or 4 ring alternatives as the 1/2 ring softens the leverage on the mouthpiece and poll. The Elliptical Lock Up removes the nut cracker action of the conventional three piece, meaning less pressure on the bars. The Elliptical Lock Up is therefore a softer option, than a conventional elliptical, although stronger than a control plate.