Kettle Gryp is a portable dumbbell adapter that turns ordinary dumbbells into dynamic workouts. Perfect for the home gym, traveling fitness enthusiast, or trainer/gym owner with limited space; Kettle Gryp gives you a full kettlebell workout at a range of weights anywhere you can find a dumbbell. Kettle Gryp can accommodate most dumbbell handles that are at least 4.5″ wide and up to 1.5″ in diameter. For reference, the standard Olympic bar diameter is 1.1″. Please see the Fitting Guide on our website for further details. Enjoy your Kettle Gryp workouts!