The CAP Commercial 12-sided Rubber Dumbbell Set includes commercial grade dumbbells in increments of 5 lb. This set comes in three sizes to ensure you have plenty of options. The 550 lb set includes lighter dumbbells from 5-50 lb, and the 1550 lb set includes 55-100 lb dumbbells. The 2100 lb set includes dumbbells from 5-100 lb. These dumbbells are built to last and have 12 sides to prevent them from rolling away and possibly causing an injury. If you're looking for a high end dumbbell set that will last for years, the CAP Commercial 12-sided Rubber Dumbbell Set is the perfect fit for you.