Usage Tips:Reliable Construction: Made from wear resistant hard steel, these spikes are designed to withstand frequent use without easily wearing down, ensuring long term performance for your track shoesEnhanced Traction: The track shoes spikes provide grip on various surfaces, making them ideal for improving skills and speed during sprints and regular training sessionsVersatile Use: greatly suited for synthetic tracks and short distance sprints ranging from 100 to 400 meters, these spikes cater to both competitive and everyday practice needsComprehensive Set: This package includes 60 track spikes along with a convenient wrench, allowing for easy installation and removal of spikes as neededOptimal Size: Featuring spikes thread size of 5 mm and a wrench size of 6.3 cmx4.3 cm/2.48 inchx1.69 inch, this set is designed to fit most standard track shoes seamlessly, providing a secure fit for enhanced performance Specification: Material: Steel Plastic Size Chart: Spikes Thread 0.5cm/0.20inch;Wrench 6.3cmx4.3cm/2.48inchx1.69inch Package Includes: 60 Track Spikes1 Wrench1Storage Box Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.