Search  for anything...

Fitvids Multi-Functional Changeable Dumbbell and Barbell Kettlebell Set with Adjustable Weights, 40LBS, 4 in 1

  • Based on 3,223 reviews
Condition: New
Checking for the best price...
$77.61 Why this price?
Save $31.38 was $108.99

Buy Now, Pay Later


As low as $12.94 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: Only 4 left in stock, order soon!
Fulfilled by Amazon

Arrives Monday, Mar 9
Order within 23 hours and 37 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Style: 40LBS, 4 in 1


Features

  • 4-in-1 Multifunctional Set - Changeable from dumbbells to barbells, this 2-in1 multifunctional set serves all your exercise and fitness purposes
  • Contents - Set of 4-in-1: Four 4LB plates,four 6LB plates, two dumbbell handles, one barbell connector, one kettlebell base with rod, two kettlebell handles, five collar locks
  • Multifunctional - Provides multiple weight options and quick transitions between dumbbells, barbells and kettlebells. Easy to disassemble and assemble. No rust, no damage to the floor
  • Adjustable Weights - With 4x 4LB and 4x 6LB, you can adjust your weight from 4LB to 20LB singles or 8LB to 40LB pairs
  • Material - Exterior is made of high-quality PE materials, and the inside is mixed with iron, cement, and sand

Brand: Fitvids


Color: Black


Item Weight: 20.9 Kilograms


Material: Polyethylene (PE)


Special Feature: Adjustable Weight


Brand: ‎Fitvids


Color: ‎Black


Item Weight: ‎20.9 Kilograms


Material: ‎Polyethylene (PE)


Special Feature: ‎Adjustable Weight


Product Dimensions: ‎42"L x 11.8"W


Style: ‎40LBS, 4 in 1


Handle Material: ‎Plastic


Number of Pieces: ‎16


Set Name: ‎4-in-1 Multifunctional Set


UPC: ‎840517402092


Number of Items: ‎4


Manufacturer: ‎Fitvids


Item Package Dimensions L x W x H: ‎19.7 x 12.6 x 6.5 inches


Package Weight: ‎48.3 Pounds


Item Dimensions LxWxH: ‎42 x 11.8 x 11.8 inches


Brand Name: ‎Fitvids


Part Number: ‎SF-40DKS-4IN1-C


Size: ‎2-in-1, 40LB


Date First Available: August 19, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Mar 9

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Changeable weights
My son's Christmas gift. He likes them
Reviewed in the United States on December 30, 2025 by Jackie

  • Horrendous bad smell
These weights smell so bad. I unboxed them and noticed a little smell. Not until I started using them did they smell up my whole house. It’s given me a headache and 12 hours later I’m still airing out my house.
Reviewed in the United States on January 2, 2026 by Jennifer Mossor

  • Great
Awesome job
Reviewed in the United States on December 2, 2025 by jamal

  • Did not come complete
I bought this item and it came without any of the kettlebell parts. That was a major selling point for me. There is no rod or the handle pieces, just weights and bars
Reviewed in the United States on December 1, 2025 by sheryl s

  • Just don’t buy this.
Order was delivered in the manufacturers packaging which ruined the surprise as a Christmas gift. Also didnt receive the kettlebell handles in the package as advertised. My honest opinion? This is not even close to being worth the money.
Reviewed in the United States on December 31, 2025 by Chase walker

  • missing parts
missing kettle bell parts, i will be seeking to have them replaced or to be given a full refund
Reviewed in the United States on December 6, 2025 by Stone

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...