5. SUITABLE OCCASIONS - Track and field training, athletics competition, cross-country running, sprinting, climbing, soccer, rugby, golf, etc. They will help you get a better training score or win a competition. 4. EASY TO CARRY AND REPLACE - Keep spikes in the box we provided and put the box in your training bag. It's good on hand when you want to change the dull spikes. You can get some for upcoming track meets. 3. THREE COLORS IN ONE - 120 spikes total, 40 each of gold, silver and black. You can choose a different color of spikes according to your shoes. They packed in a small clear box with a red plastic wrench. 2. SIZE - 1/4 inch(6.35 mm) in length, general size, suitable for most training shoes. Each spike is as long as your pinky fingernail, very light. The box used to store spikes is only palm-sized. 1. DURABLE MATERIAL - These Track and Filed spikes are all made of carbon steel, stain and corrosion resistant, 2 times harder than ordinary steel, allow you to run more than 10,000 meters.