Packaging Includes:50 1/4" silver spike , 1 yellow spanner, with transparent storage box, convenient for storage and transportation. High Material: Made of high-quality steel. The nail driver spanner is made of plastic and is unbreakable. Size:The spike length is 1/4' (6.35 mm) and fits most athletics shoes. Application:The pyramid needle design of the spikes increases friction between the sole and the ground to prevent slipping, keeping you safe and increasing your running speed. Note:Nailing spanner for easy installation of spikes. High Material:Made of steel.