【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 shoes 【Enhanced Traction】: The track shoe spikes provide grip on various surfaces, making them ideal for improving skills and speed during sprints and regular training sessions 【Versatile 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 needs 【Comprehensive Set】: This package includes 50 track spikes along with a convenient wrench, allowing for easy installation and removal of spikes as needed 【Optimal Size】: Featuring a spike thread size of 5 mm and a wrench size of 8 cm x 5.4 cm (3.15 in x 2.13 in), 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 0.5 cm (0.20 in); Wrench 8 cm x 5.4 cm (3.15 in x 2.13 in) Package Includes: 50 Track Spikes, 1 Wrench, 1 Storage Box Note: Please allow slight differences of 1–2 cm (0.39–0.79 in) due to manual measurement