10lb and 15lb plates are not meant to be dropped on their own. These sizes can be dropped only when combine with heavier weights (25lb, 35lb, 45lb & 55lb). If dropped on their own, plates may crack/break. Improper use will void the warranty.
The 10lbs and 15lbs AmStaff Fitness Crumb Rubber Bumpers are covered under Fitness Avenue’s 6 months warranty from the time of purchase. The 25lbs - 55lbs rubber bumper plates are covered for 3 years from the time of purchase.