Specification Brand : HARFINGTON BulletPoint1 : Size - Nail Head Length: 6.4mm (1/4 Inch); Nail Head Diameter: 7mm / 0.28"; Thread Size: 5.2mm / 0.2"; Total Length: 12.5mm / 0.49"; Thread Pitch: 32G. BulletPoint2 : Material - Made of alloy 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. BulletPoint3 : Feature - 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. BulletPoint4 : Application - Cutout design, lightweight, 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. If you like running, cross country, or you are a sports enthusiast, these track spikes will be of great help. BulletPoint5 : Package Content - 2pcs x track spikes.If you have any questions, please feel free to contact us. Color : Silver Tone ItemName : HARFINGTON 2pcs Track Spikes 1/4 Inch Alloy Steel Hollowed Short Nails Replacement Spikes for Sprint Short Running Track Shoes, Silver Tone ItemPackageDimensions_Height : 0.59 inches ItemPackageDimensions_Length : 3.54 inches ItemPackageDimensions_Width : 2.36 inches ItemPackageQuantity : 2 ItemTypeKeyword : golf-spikes Manufacturer : HARFINGTON ModelNumber : hta220729hh0187 PartNumber : hta220729hh0187 Pattern : Solid ProductDescription : Made of alloy 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. Cutout design, light weight, 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. If you like running, cross country, or you are a sports enthusiast, these track spikes will be of great help.