With a newly treated plate, the New Balance 400 is a high-end, high-performance track spike. With no shroud and a glove-like fit, sprinters will feel as light and as fast as ever. For distances up to the 400 meters. Synthetic upper with aggressive foot placement for speed. Eight-spike configuration. Includes 1/4" pyramid spikes and a wrench. Wt. 5.25 oz.