The Nike Strength Grind/Smoke Rubber-Coated Kettlebell Bundle 4–16 kg is built for athletes, fitness enthusiasts, personal training studios, and gym spaces that need reliable kettlebells for progressive strength training. The bundle gives users multiple weight options, making it suitable for beginners, intermediate users, and advanced training routines.

Each kettlebell is made with a cast iron core and a premium rubber coating over the bell. The Nike Grind/Smoke Grey version includes recycled Nike Grind rubber particles, giving each kettlebell a unique finish while helping protect floors and reduce surface damage during use. Nike Strength lists its rubber-coated kettlebells with a weight range from 4 kg to 24 kg, weight precision of +/- 3%, handle diameter from 30 mm to 39 mm, and handle width from 160 mm to 215 mm, depending on the selected size.