St Croix The Concorde steel is a replica of the Concorde aluminium, designed predominantly for the thoroughbred. Front and hind shape designed to suit the thoroughbred woth tapered closed heels and maiximum sole relief. 14 nail holes designed to allow maximum nail height and position choice. Strong, solid clips front and hind. The size is increasing in proportion with the hoof. Sizes 3 – 8 front and hind toe clip. Sizes 5-8 side clipped hind.