Feature What to Look For / Why It Matters
Type (Fixed or Adjustable) A fixed dumbbell is a single solid 30kg weight. An adjustable dumbbell comes with removable plates, allowing you to change the weight as needed — more versatile for varied workouts.
Weight Accuracy Ensure the dumbbell actually weighs 30 kg as advertised. Some cheap options might be underweight or poorly calibrated.
Material Common materials include cast iron, chrome, vinyl-coated metal, or rubber. Choose something durable and rust-resistant. Cast iron is very strong, while vinyl is beginner-friendly.
Grip / Handle Design The handle should have a non-slip (knurled) grip or rubber covering to prevent slipping during use. Comfort and safety are key.
Locking Mechanism (for adjustable type) If it’s adjustable, check how the plate