Description: 【Reliable Construction】: Made from high wear resistant hard steel, these track spikes are designed to withstand extensive use, ensuring long term performance for track and field athletes 【Versatile Use】: Ideal for use on synthetic tracks, these track shoes spikes are suitable for middle and long distance running, triple jump, and hurdles, providing great adaptability across various events 【Enhanced Performance】: Engineered to offer grip and stability, these track spikes help increase and conserve energy during athletic activities 【Package Contents】: Includes 20 track spikes with a thread of 5 mm and 1 wrench measuring 6.3 cmx4.3 cm/2.48 inchx1.69 inch, offering everything you need for quick installation and adjustments 【Material】: Crafted from steel and plastic materials to ensure durability while maintaining lightweight characteristics essential for competitive sports Specification: Material: Steel Plastic Size Chart: Spikes Thread 0.5cm/0.20inch; Wrench 6.3cmx4.3cm/2.48inchx1.69inch Package Includes: 20 Track Spikes 1 Wrench Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.