The Bridle Arrestor (also known as a "gullet strap") is a must have if you drive pairs, and a great safety feature for the single horse as well. It keeps the bridle securely on even if some joker is trying to pull his neighbor’s bridle off with his bit. This straps connects the throatlatch to the noseband under the horses jowl, locking down the bridle much like a lunging caveson. It also has a hand D-ring to attach a leadrope to.