【SIZE and Quantity】3/16inch length(Without base),100pcs steel spikes and 1pcs spike wrench in storage box 【LONGER service life】Made of premium steel,our spikes can serve about 60 hours,The service life is 3 times that of ordinary steel 【Usage Occasions】Track and field training,running, hiking, high jumping, cross country and other outdoor sports activities 【Features】Excellent stability, normal grip, can provide the right grip in Middle and Long Distance running, and can save energy 【RELIABLE PURCHASING】Any questions or disatisfactions with your purchase, please kindly let us know, Nuolifee Direct guarantee you replacement or refund track spikes