One pair of them replaces up to 34 individual free weights. The advantage is that you save both money and the space that a whole pack of free weights would take up.
You can go from 5 lbs up to 90 lbs, just by turning a dial and locking it in.
When you lift - tumblers automatically fasten to the weight you want.
Since their introduction, many cheaper companies have tried to copy the original design (without necessarily the quality).
Selecttech dumbbells come in 3 different weight sets:
The warranty on them is pretty decent: 2-year limited warranty on all parts, 5-year warranty on weight plates, 1-year warranty on labor.
You can also get the Selecttech dumbbell stand and weight benches.
Overall Conclusion: Recommended
Bowflex Selecttech dumbbells are a great value - They take 34 individual free weights and shrink them down to 2 dumbbells. This saves you both space and money.
Plus they're a lot better quality than some of the cheaper imitations out there that have reports of breaking and cheap locking mechanisms. They also have a longer warranty (which tells you something.)
If you prefer the advantages of free weight workouts and want to save some money on your home gym, Selecttech dumbbells are definitely worth checking out. While a bit bulkier than regular free weights, they'll save you a ton of space and extra cost.
Where To Buy At A Discount:
You can often save money by skipping the middleman and buying direct from the Bowflex manufacturer. It's easier to deal directly with them and they often have deals, depending on the time of year.