Our Dodecagonal 12‑Sided Dumbbells adopt solid cast‑iron inner core, wrapped with injection‑molded TPE or TPU outer shell, odor‑free, wear‑resistant and built for heavy‑duty training. Unique 12‑sided head design delivers superior anti‑roll stability, much better than standard hex dumbbells. It stays stable on the floor and avoids sliding or rolling away during workouts. Three handle selections to match different project budgets: hard chrome‑plated, zinc‑plated and stainless steel handle. Suitable for both home gym and high‑traffic commercial fitness centers. Weight range covers 5‑25kg, in 2.5kg increments, meeting progressive strength‑training requirements from beginners to advanced users. Full OEM & ODM service is available. You can customize logo, shell color, outer material and handle style according to your demands. Wholesale orders from gym distributors are warmly welcome.