Kiloflex mini-10 training plates are constructed of high grade rubber and built to withstand the frequent impacts of CrossFit and Olympic lifts. A smaller 360mm design gives the mini-10 a width that is equal to that of standard 15lb bumper plates in a compact 10lb weight. The mini-10 is perfect for technique training, children learning lifts, or beginners. If you are frequently seeing cracking or torquing on standard 10lb bumper plates, the mini-10 is a great option for your gym!