MX Select

MX Select uses all-metal internal gears instead of plastic, which reviewers say gives them durability that most competitors cannot match. The dumbbells are designed to feel and behave like traditional fixed-weight dumbbells, with a handle feel and weight balance that closely mimic the real thing.

Each side must be adjusted independently, which slows down weight changes compared to single-dial rivals. Reviewers also note that the adjustment mechanism requires deliberate, unhurried movement — rushed changes can cause misalignment.

Yes. Replacement parts are available for nearly every component, which makes long-term repair practical. This separates MX Select from most rivals and appeals to buyers who want durability over the long term.

They are best for home gym users who want the closest thing to a traditional fixed dumbbell, prioritize long-term durability and repairability, and are willing to accept a slightly slower adjustment process. They are not for anyone who demands one-handed, single-motion weight changes.

Yes. The outer housing is plastic, even though the internal gears are metal. This is a trade-off that some buyers object to, even though the internals are built for durability.

Yes. The square plate profile keeps the dumbbell stable on flat surfaces and prevents rolling, which reviewers note is a practical feature for home use.