• Rubber: More affordable and durable, but may have an initial odor. • Urethane: More expensive but highly durable and abrasion-resistant, with less odor than rubber. • Cast Iron: Least expensive, but may not be as floor-friendly and might require more careful...

Urethane and high-quality rubber hex dumbbells are designed for heavy use and can withstand more abuse than bare steel dumbbells.

Dumbbell racks are often sold separately, so consider the number of racks needed for your set.

Handle length is generally standard, but handle diameter may vary with weight.

New hex dumbbells may have a protective oil coating that wears off with use.

ZDC Fitness offers lifetime warranties for home use and 1-year warranties for commercial use.

Some manufacturers offer customized logo options for branding or marketing.

Some rubber dumbbells may have an initial odor that dissipates over time.

It's important to verify weight consistency and variations before purchasing.

While rubber and urethane dumbbells are more impact-resistant than bare steel, they are not designed to be slammed.