Kettlebell workouts have grown in popularity over the past few years. They're just so easy to use and super effective for increasing strength. But not all kettlebells are created equal. The best are adjustable, and therefore incredibly versatile. Top of the list? The Bowflex SelectTech 840 Kettlebell. It's a single device that can have you lifting anywhere from 8 to 40 pounds. And even better, we just spotted it at Amazon for $119, an impressive $80 off.

How does it work? While the kettlebell is sitting in the base, just turn the dial to the desired weight — 8, 12, 20, 25, 35 or 40 pounds — and you're ready to lift.

The Bowflex SelectTech 840 Kettlebell is the perfect at-home device because it’s a self-contained unit — no need to store a bunch of different weights to get a well-rounded workout. Additional features include free access (via the Bowflex app) to 24 trainer-led exercises — swings, rows, squats, twists — plus tips on improving your form.

An exercise newbie praised: "As a beginner to fitness, this is phenomenal. Even though it’s larger than standard kettlebells, its size and shape don’t interfere with your movements. The bell handle is a little thinner, but it’s very comfortable in my hands. Also, being able to quickly shift from one weight to another between exercises is so nice. In just three seconds you can have a heavy or lighter kettlebell."

A shopper who gave the kettlebell a five-star review said: "It is super-easy to use, and the versatility of the weights available makes it great for everyone, from beginners all the way to those people who can easily throw around a 40-pound kettlebell."

"If used properly this kettlebell is very safe and versatile," raved another satisfied customer. "It stores well, has a comfortable/wide handle and adjusts weight in good size increments. If we consider taking a road trip any time soon, I would bring this, a resistance band and jump rope for all my workout needs..."

Convinced yet? Then you better move quickly to grab the genius Bowflex SelectTech 840 Kettlebell for $80 off while you can.

If you have Amazon Prime, you’ll get free shipping, of course. Not yet a member? No problem. You can sign up for your free 30-day trial here. (And by the way, those without Prime still get free shipping on orders of $25 or more.)

The reviews quoted above reflect the most recent versions at the time of publication.

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