PowerBlocks are the only dumbbell system that expands to meet your strength needs, PowerBlock dumbbells are the most versatile and effective exercise tool ever developed for strength training. PowerBlocks act just like a weight stack at the gym, with a weighted 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.
The Sport 50 EXP has a weight selection from 2-22.5kgs, and the Stage 2 Add on Kit expands them to 33 kgs per hand. The set together replaces 22 pairs of dumbbells or 715.9 kgs of free weights.
Increments achieved with the Sport 50 + Stage II add-on kit are; 1, 2, 3, 5, 7, 8, 9, 11, 12, 14, 16, 17, 18, 20, 22, 23, 25, 26, 27, 29, 31, and 33 kgs per hand.