Reins are used to slow and direct the animal
Reins attached to the rings or shanks of a bit
A mecate
Pure braided rawhide romal reins
Split reins attached to a western style snaffle bit

Reins are items of horse tack, used to direct a horse or other animal used for riding. They are long straps that can be made of leather, nylon, metal, or other materials, and attach to a bridle via either its bit or its noseband.