Description: 【Suitable for Use】: These track spikes are great for tracks and short sprints of 100-400 meters, making them a versatile addition to your athletic gear 【Sturdy Material】: Made from steel material, these track shoe spikes are designed to withstand rigorous training sessions, ensuring long term use 【Product Dimensions】: Each spikes measures 0.7 cm/0.28 inch in length with a thread diameter of 0.5 cm/0.20 inch, providing optimal grip on the track without adding excessive weight to your shoes 【Professional Training Tool】: Whether you're an amateur athlete or training professionally, these quality track spikes can help improve your performance by providing better traction and speed on the field 【Packaged Set】: This set includes 16 replacement spikes for track shoes, allowing you to fully outfit a pair of track shoes with extras on hand for replacements as needed Specification: Material: Steel Size Chart: Nail Length 0.7 cm/0.28 inch Thread Diameter 0.5 cm/0.20 inch Package Includes: 16 Track Spikes(4 Pack) Note: Please allow slightly errors 1-2cm differences due to manual measurement.