PowerBlocks work intuitively. Rather than requiring you to buy a room full of dumbbells, PowerBlocks act just like a weight stack at the gym, with a weight handle that fits inside the first weight, which fits inside the second, which fits inside the third, etc. When you want to change weights, you simply move the weight selector pin into the appropriate slot and you're set.
As you lift the core, all the weights above the selector pin are lifted at the same time, turning your 3-pound dumbbell into a 6-pound dumbbell, or your 6-pound dumbbell into a 12-pound dumbbell. Not only is the system remarkably easy to use, but it's also cost- and space-efficient, as a single pair of dumbbells can do the work of dozens.
The SportBlock set offers a maximum weight of 24 pounds per hand and carries a limited 15-year warranty.
This set adjusts from 3-24 lbs in 3 lb increments (3, 6, 9, 12, 15, 18, 21, 24 lbs) in each hand. This set has a maximum weight of 24 lbs per hand and cannot be made heavier than the 24 lb maximum weight per hand.
It replaces 8 pair or 16 fixed dumbbells that would have a combined weight of 216 lbs.