The Finest Engineering

The Most Premium Materials

1 Year Warranty

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Rock Solid Fitness: The new trusted name in high quality and uniquely designed fitness equipment.

Our journey began with the realization that the available options for adjustable dumbbells were not meeting our expectations. We found a lack of high-quality adjustable dumbbells that were designed the way we liked.

We didn’t like the big square and bulky adjustable dumbbells, and we didn’t like the dumbbells with an awkward “skeleton” no matter what weight we chose.

The result was our amazing TectonicPlates, which feature a sleek and minimalist design while still providing the functionality and adjustability you need to take your workouts to the next level.

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Our Top Selling Products

Our products are superior in quality and unique in design.

Our Customers' Fitness Story

We would love to hear your story!

Hey everyone, these are the best adjustable dumbbells you will find anywhere and the best price to!! I've searched for a pair of adjustable dumbbells for a while that look, feel, and work good. RSF Tectonic plates tops the list by far. When you drop down to a lightweight they are not bulky, they shrink down according to the weight. They're nice and square and flat, super comfortable when you place them on your thighs. These dumbbells are less money than the competition and way way

Jhon Banman

Delivery was fast. Had an issue with one of the dumbbell handles and the seller was quick to fix the issue. One person found this helpful Helpful

Bobby Tam

Really happy with this purchase. They feel solid and they're the exactly what I needed for heavier workouts at home. Slight rattle when doing explosive movements like curls or press work but nothing deal breaking.

Michael

My daughter ordered dupattas 3 months back and the fabric quality and the work are excellent. They gave timely notification of the order status and delivered well in time.

Elena Gilbert

My daughter ordered dupattas 3 months back and the fabric quality and the work are excellent. They gave timely notification of the order status and delivered well in time.

Elena Gilbert

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