of rings. The front cinch is secured to the saddle by means of a latigo on the left, and on the right, by either a latigo or a billet. Latigos are not removed until worn out or broken. They run through the ring or buckle of the cinch (also called a cinch ring), and back to the rigging, sometimes multiple times for extra security. Modern latigos have several holes at the end so that a cinch can be buckled at a set tension, though the cinch may also be secured by a knot called a "latigo knot," which is a type of half-hitch. The off-side billet is a shorter, doubled piece of leather with holes along its length, somewhat heavier and less flexible than latigo leather. It runs through the rigging cinch ring and both ends buckle onto the cinch. Older saddles may use a latigo on the off side, but this is less common. Once adjusted to the horse, an off-side latigo or billet is seldom disconnected from the cinch, which remains attached to the saddle until it needs to be replaced, unlike the girth of an English saddle, which is to be removed on both sides when not in use. While leather is preferred for latigos, nylon web is sometimes used, particularly on cheaper saddles, though it is prone to slip when knotted and the holes may tear more easily. When used, a back cinch, made of several thicknesses of leather, is held on by a simple heavy leather billet on each side of the saddle that buckles just tight enough to touch the underside of the horse, but not tight enough to provoke discomfort or bucking. At the belly midline, the front and back cinches are joined by a light belly strap, called a cinch hobble, that prevents the back cinch from moving too far back. Rigging placement A saddle that has only a cinch in the front is "single rigged". A saddle that has both a front cinch and a back cinch (sometimes called a flank cinch, even though it should never go around the horse's flanks) is "double rigged". The rear rigging is meant to stabilize the saddle. The back cinch is always located just below the cantle and held in place with a cinch hobble to prevent it from slipping back; however, the position of the front rigging varies. The rig positions are named