Although a standard kettlebell made of cast iron might be more durable in the long run, you're going to have to spend a lot more on acquiring the entire set if you want to progressively tack on more weight to your kettlebell workouts, per T3. This problem is eliminated with an adjustable kettlebell as its usually a lot cheaper than its separate counterparts. That's because you'll be buying adjustable weights (usually between 10 and 40 pounds) within one piece of equipment, in one purchase (via Power Lifting Technique). One adjustable kettlebell can give you the benefit of owning six or more standard kettlebells, according to Healthline.
It goes without saying that having six or more regular kettlebells in one piece of equipment is going to also give you variety in your workout. You can progressively increase the level of your strength training without having to go out and purchase new kettlebells every time you want to add more resistance to your workout.
Adjustable kettlebells are also a great option for a home workout setup because they're easy to store away. They won't take up as much space as having multiple kettlebells that would require a bigger storage space, reports Power Lifting Technique.
