*** IMPORTANT - 10 pounds plates are NOT designed to be used ALONE. To make all plates in same diameter, all standard 10 pounds plates are thin, so they will bend if you use them alone. This will damage your 10 pounds plates *** Bumper plates, or just bumpers, are Olympic-sized weight plates that are made of thick, dense rubber for the purpose of allowing a loaded bar to be safely dropped without risk of damaging your lifting platform, the plates themselves, or the floor. These high-density rubber plates with solid stainless-steel insert can withstand repeated drops. They will not only protect any type of floors, but also protect your bars. Their weight is labeled in both pounds and kilograms. They’re the perfect weights for all types of resistance training including weightlifting, powerlifting, and CrossFit.