ADJUSTABLE KETTLEBELLS.

Shop Stealth Adjustable Kettlebells, designed for UK home gyms, garage gyms, strength training and conditioning workouts. Replacing multiple fixed kettlebells in one compact system, they are perfect for swings, squats, presses, rows, carries, circuits, HIIT, functional fitness and full-body training. Ideal for beginners, experienced lifters and home gym owners, this collection gives you a space-saving way to build strength, power, endurance and athletic performance from home.

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About Assassin Goods

Strength equipment, hand-picked for serious training.

Assassin Goods is a UK-based strength equipment retailer. We curate the gear we'd want in our own gyms (adjustable dumbbells, kettlebells, racks, accessories), chosen for build quality, longevity, and real-world performance rather than spec-sheet promises.

Our team is based in Cumbria and ships across the UK and EU. Whether you're kitting out a home gym, building a serious garage setup, or fitting out a commercial space, we'll help you choose what actually fits your training, your space, and your budget. Questions? Get in touch. We answer every message ourselves.

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Google Reviews

★★★★★ 4.9 (486)

Trustpilot

★★★★★ 4.6 (250)

Judge.me

★★★★★ 4.91 (761)

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Son muy fáciles de usar y permiten cambiar el peso de manera rápida y sencilla.

Great dumbbells. Top quality.

Quick delivery and have to say what a great product. Definitely enhances the way I train and no need for multiple dumbbells. 5 stars for sure. Definitely recommend.

Excellent quality and solid feel

These dumbbells are great. I’ve been using these 3x per week for a month and, considering they are AG’s budget range, they feel really premium. Very quick and easy to select different weights, and reasonably easy to dock back into the base (can be a little fiddly as with all adjustables). They look ace, and feel so solid and reliable. I’ve no regrets whatsoever with purchasing these - very impressed.

The dumbbells are a joy to use

The dumbbells are a joy to use. Very easy to select the desired weight and the mechanism feels very secure. The 1.5kg increments are just right. At first they looked quite big and bulky compared to my neoprene dumbbells, but they don't get in the way at all and feel much nicer in the hand than the neoprene dumbbells. They are even upgradeable without having to buy a complete new set, but for me 23.5kg per dumbbell is plenty!

A huge upgrade from my original York adjustable dumbbells

A huge upgrade from my original York adjustable dumbbells. The selector is simple to operate with one hand, making weight changes far easier than with my old set, which required both hands.

The build quality is top drawer, and I really appreciate that the dumbbell remains linear at every weight setting. It feels like a well-engineered, premium piece of kit.

One dumbbell had a minor issue in transit, but Assassin’s aftercare was every bit as impressive as the product. I emailed in the evening, received an immediate response, and the issue was quickly resolved.

Excellent dumbbells, backed by excellent customer service. Highly recommended.

ADJUSTABLE KETTLEBELLS.

Customers are saying

Strength equipment, hand-picked for serious training.

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