Track Spikes Product Name: Effort EF Product Number: TTP506 Size: 26.0cm Includes shoe case and wrench. I purchased these spikes before, but I never used them and have been storing them at home. Also included is a set of replacement spikes that I bought with the original spikes. Please check the photos. Track and field specific replacement spikes, product number TTP983 Size: 9mm/18 pieces Although they are new and unused, there may be some discoloration. Please check the photos. The heel angle is set gently, and there is extra room around the toes, making them easy to wear even for beginners. The sole uses a synthetic resin plate to firmly support the feet, while a portion of the front is cut out to allow for flexibility according to foot movement. The outer part of the upper (vamp) uses "RHYNO SKIN," a material with approximately four times (compared to our standard) the abrasion resistance of regular artificial leather. "AHAR PLUS," our original material with approximately three times (compared to our standard) the abrasion resistance of conventional rubber, is used in areas of the sole that are prone to wear, enhancing durability.