Harness Leather Curb Strap from Martin Saddlery and Classic Equine. Stainless Steel Buckles, Hermann Oak Harness Leather.
Curb Straps serve many purposes. They prevent pulling the ringed bits through the side of the horse’s mouth and help to stabilize the bit and keep it centered. For one-handed riding, they help to stabilize longer shanks and can add be adjusted to add more pressure for precision. They also help to protect the horse's mouth while roping by preventing the rope from getting between the shanks and catching one side, forcing one shank up and out.