They are as durable as you can find and made to take abuse and last year after year in the most rigid commercial settings. This 12 side head helps resist rolling off benches or across the gym floor. This type of dumbbell is the most maintenance-free dumbbell you will find. These come with a 5-year commercial warranty against breaking.
This type dumbbell, solid steel, and polyurethane coated stands alone at the top of the class in commercial-grade dumbbells being manufactured today. The structural integrity is as solid as they come. Complete set from 105 to 130 in pairs.