Adjustable Dumbbell System by Marcy Includes: Adjustable dumbbell with 10 adjustable weight plates, totaling 50lbs Modify your dumbbell between 10lbs and 50lbs – 10lb / 15lb / 20lb / 30lb / 40lb / 50lb Convenient weight selector makes it easy to choose which interlocking plates you’d like to use for your workout. Easily store your Marcy Adjustable Dumbbell System on the included fitted tray. Both the tray and the plates themselves show how much weight is on the dumbbell handle. Given its unique shape, the Marcy Adjustable dumbbell will not roll, keeping your weight selector safe. US Patent 7,588,520, Powered by FLEX