The spikes simply screw into a preformed hole inside your horse's shoe, made by your farrier. All our spikes require a standard 3/8" Whitworth preformed hole.We recommend that you choose the best spike for the ground - soft or hard - and your performance requirements. We recommend using a rounded head on the inside edge of the shoe to avoid injury from opposite leg strikes.Your cleat kit should contain a variety of different shaped cleats to suit your horse's needs, a tap to clean the cleat hole threads before use, a wrench and cleat plugs.Stud holes should always be plugged when not in use to prevent stones and debris from entering or damaging the hole.In addition, it may be worth investing in a magnetic metal bowl that prevents the studs from getting lost and is also useful for finding them when they fall into the grass.We recommend checking the holes in your studs the day before a competition to ensure that the shoe threads are intact and that the studs apply properly.Af...