PowerBlock Personal Trainer Set, 5 to 50 Pounds per Dumbbell Item may ship in more than one box and may arrive separately Pair of adjustable dumbbell weights for efficient, cost-effective strength training Adjusts from 5 to 50 pounds in 2.5-pound increments for maximum versatility Selector pin lets you change weights easily, just like with weight stack at the gym More compact and balanced than traditional dumbbells; padded handle for wrist protection Increments achieved: 2.5, 5, 7.5, 10, 12.5, 15, 17.5, 20, 22.5, 25, 27.5, 30, 32.5, 35, 37.5, 40, 42.5, 45, 47.5 and 50 lbs per hand. Offers maximum weight of 50 pounds per hand; limited 10-year warranty. personal trainer set is not expandable and is compatible with the Elite/Pro weight stand Item ships in two boxes and may arrive separately