Blenheim Standing Martingale in Black. The Blenheim range is made from high quality leather that is cut by hand and stitched by craftsmen and features stainless steel fittings. The Standing Martingale offers an adjustable neck strap and girth loop. The Standing Martingale attaches to the noseband and is useful for horses that raise the head too high to avoid the contact; if the horse raises the head above the contact, pressure is applied to the noseband encouraging the horse to lower the head. The Standing Martingale should only be used with a cavesson or flash noseband.