Well I had a happy mouth D- ring but my horse, Luna, kept pulling on the bit. I needed a little more severe bit because of her a lways pulling her head. I couldn;t find one of these bits anywhere local, So i looked online. Now Luna doesnt pull one bit!! get it? one BIT you get it? i bought a bit and well, Nevermind then. But really, this is a great bit it changed my life!!! ok i admit, that is a little over it(the whole "it changed my life!" thing) but really it is a great bit.