Which adjustable dumbbells are best for small weight increments?

For fine progression, reviewers point to PowerBlock models that adjust in 2.5 lb steps with adder weights, and budget twist sets that advertise 3–6 lb increments. By contrast, several owners of dial-style sets like NordicTrack note frustration that they only jump in 5 lb steps, making the gap between weights feel large for smaller lifters.