Normally the billets are sewn in but with this option we install either 2 or 3 D-rings on each side for the billets to attach to. The 3 D-ring option allows you to choose what billet position works best for your horse. This is a good option for horses with a more forward girth groove. 
 
This option also makes it easy to replace your billets should you ever need to. The billets attach to the Ds with stainless steel chicago screws. Check them for tightness before each ride.