valkenswaard elastic running martingale attachment brown gold fThe elastic TRUST Valkenswaard martingale fork is perfectly matched to TRUST breastplates. The distance between the two rings can be adjusted using the leather insert, which can easily be moved up or down. This allows the martingale fork to be precisely adapted to the horse, providing the right level of support while riding. The leather strap features a roller buckle for easy attachment to the breastplate.