Specification:Size: 6.8mm / 0.28"Nail Head Diameter: 8mm / 0.31"Thread Size: 5.3mm / 0.21"Total Length: 13mm / 0.51"Tooth Spacing: 32GFeatures:Made of steel, it prevents rust and corroding, has high hardness, is strong and wear-resistant, is not easy to break, and has a long service life. Helps improve your running speed, and can achieve better results in competition.Tapered needle shape track spikes can increase the friction between the shoe and the ground, prevent skidding and ensure safety. It also improves the balance of traction, flexibility and speed as you run. And will not damage the runway.Provides optimal grip and stability for dry terrain such as athletic fields. General size for most running shoes to use, suitable for sprints of 100-400 meters.
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