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Core Fitness

Core Fitness Adjustable Dumbbell Set 5-50 lb

Low-cost twist-lock option for home training

Amazon customer rating

4.5/5 from 1,677 ratings

Checked September 28, 2026

Weight range
5–50 lb · 2.3–22.7 kg
Increments
5 lb
Mechanism
Twist Lock
Price band
Budget
Check price on AmazonCompare

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Quick verdict

LiftEvidence editorial assessment

Twist-lock dumbbells covering 5-50 lb in 5 lb steps. Compact and lower-cost option for light to moderate home training.

Most suitable for: Budget-conscious beginners and intermediate lifters needing up to 50 lb.

Specifications

Source: manufacturer listing

As stated by the manufacturer. Rows are omitted when the information was not available or could not be confirmed.

Brand
Core Fitness
Model
4333853251
ASIN
B01J8S38LW
Maximum load
50 lb (22.7 kg)
Minimum load
5 lb (2.3 kg)
Increments
5 lb
Adjustment mechanism
Twist Lock
Adjustment speed
Fast
Length at maximum load
36.8 cm
Head design
Plate Stack
Material
Aluminum and composite
Handle
Aluminum textured rubber
Handle diameter
31.8 mm
Expandable
No
Storage cradle
Included
Warranty
2-year parts warranty
Replacement parts
Available

Who it suits

LiftEvidence editorial assessment

Best suited to

  • Beginner

Budget-conscious beginners and intermediate lifters needing up to 50 lb.

Less suitable for

Advanced lifters needing heavy loads or high impact tolerance.

Strengths and drawbacks

LiftEvidence editorial assessment

Strengths

  • Low price
  • 5-50 lb range
  • Simple adjustment
  • Compact
  • 2-year warranty

Drawbacks

  • 50 lb maximum
  • Cradle issues
  • Plastic components
  • Low drop tolerance

Handling and durability

LiftEvidence editorial assessment

Our interpretation of the specifications, stated construction and recurring customer feedback. We have not independently tested this product.

Traditional dumbbell feel
Good
Balance
Good
Exercise interference
Low
Heavy training
Limited
Drop tolerance
Low
Build quality
Good
Durability
Good

Evidence and product claims

Scientific evidence, independent testing and manufacturer claims are different kinds of information and are not equivalent.

Scientific evidence

Strength: Limited

Category evidence supports resistance training

Independent testing

Limited independent testing identified

Manufacturer claims

Manufacturer claims one-handed TwistLock adjustment

Marketing statements; not independently verified.

Customer feedback

Source: Amazon customer reviews · checked September 28, 2026

Amazon customer rating

4.5/5 from 1,677 ratings

Checked September 28, 2026

Customer ratings reflect user experience on Amazon. They are not LiftEvidence ratings and are not controlled evidence.

Recurring themes

Praised for easy adjustment, compact size and value. Recurring issues involve cradle sticking, plate movement and damage after drops.

Commonly praised

  • Easy adjustment
  • Compact
  • Good value
  • Comfortable grip

Commonly criticised

  • Cradle sticking
  • Plate movement
  • Mechanism jams
  • Drop damage

Editorial scores

LiftEvidence editorial assessment · 0–10

Build quality
6.0
Durability
6.0
Adjustment
7.0
Ergonomics
6.0
Versatility
5.0
Value
8.0
Heavy training
3.0
Compactness
7.0

Editorial judgements from the manufacturer's specifications, stated construction and recurring customer-review themes, using the same criteria for every product in this category. They are not measurements, and we have not tested this product. How we evaluate

Compare with other adjustable dumbbells

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Where to check the price

LiftEvidence is not the seller. These links lead to the Amazon listing for this model; availability differs by country.

Amazon US

Core Fitness Adjustable Dumbbells

Check price on Amazon