Running spikes provide extra grip and traction on various surfaces Running shoe spikes can help you run faster more efficiently and prevent injuries by reducing the risk of slipping or slidingRunning shoe spikes can be a great way to enhance your running experience but they also require some care and maintenance You should always check your spikes before and after each run and clean them regularly to remove any dirt or debris You should also replace your spikes when they become worn or damaged or when you switch to a different surface or eventEACH SET = 12 PIECES OF 1 SIZE SPIKE IN A BLISTER PACK- 5mm 6mm 7mm = Needle Style