Here is a convenient product that turns your dumbbells into kettlebells for strength training. The JUST4U Kettle Grip can lift most standard dumbbells from 1″ to 1.3″ in diameter. It has a rubber-coated handle to go easy on your hands as you lift.
This kettlebell grip has max weight capacity of 100 pounds. It weighs 1.5lbs and lets you easily switch weight.