Product DescriptionDescription: - 【PACKAGE】: You will receive 12pcs starting block spikes, enough quantity for the replacement of old or broken spikes. - 【】: Track starting block spikes cleats are made of steel material, weather resistant, and for long time use. - 【DIMENSIONS】: The replacement sprinter pedals cleats thread is M4.8 and they are compatible for all standard domestic starting block and are easy to use and replace. - 【FEATURE】: The stable design can offer grip and stability during use, great for track and field equipment such as starting block and running aids, offering - 【GREAT GIFT】: The replacement studs are easy to use and quick to install. The running block studs are good gifts for your family, friends, colleagues, and other people who love sports. Specification: - Material: Steel Size Chart: 6.8mm Thread diameter 0.48cm/0.19inch Nail tip length 0.68cm/0.27inch 11.2mm Thread diameter 0.48cm/0.19inch Nail tip length 1.12cm/0.44inch 13.5mm Thread diameter 0.48cm/0.19inch Nail tip length 1.35cm/0.53inch Package Includes: 12 Starting Block Spikes Note: Please allow slightly errors due to manual measurement and different monitors.