helsinki running martingale attachment brown silver fThe TRUST Helsinki martingale fork features an open design and can be adjusted at three points to ensure an optimal fit. It is designed to match TRUST breastplates. The strap used to attach the fork to the saddle is fitted with a roller buckle, allowing for easy and secure attachment to the breastplate. In addition, the martingale fork includes a special clip buckle for quick attachment to the reins.