dumbbells
Flybird Adjustable Dumbbell 25lb/55lb
While a popular space-saving option, this dumbbell falls into the 'red flag' category for durability due to its reliance on plastic selector components and a dial mechanism which has a higher failure rate than solid steel. It lacks premium materials like a CPU coating or stainless steel handle, and the brand does not provide specific weight tolerance guarantees common in higher-end equipment.
Sources & References
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