I find them kinda clunky and expensive.
I'd much rather use traditional dumbells.
At home I use a vertical dumbell rack with 7 pairs of dumbells (each pair a different weight). Depending on the exercise I'm doing and the weight I need, I just walk over to the rack and grab a pair ,do my set and then grab a heavier or lighter pair as needed. No fussing with collars of any kind and it's very fast.



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