A premium spike designed for long jumpers, triple jumpers, and pole vaulters of all abilities. Medial/lateral strap on the upper with hook-and-loop closure holds your foot in place from approach to take-off. SharkDuo outsole for increased traction on various track surfaces. Extended 11-spike plate for increased energy transfer and more power at take-off. Includes 7mm pyramid spikes and a wrench. Wt. 8.9 oz.