Kettlebells and kettlebell training have been around for hundreds of years, and because of the intense workout"s they provide, they are now a staple tool in many fitness buffs arsenal. This Hers 30lb. kit by Impex Fitness includes one 5lb., one 10lb., and one 15lb., vinyl coated kettle bell. The benefits to kettlebell training are many, including targeting all major muscle groups, strengthening core and abdominal muscles, toning and defining muscles, burning fat and losing weight, increasing overall strength and endurance and increasing flexibility. The large comfortable handles allows for easy grasping during your circuit training routine. A two-year limited manufacturer"s warranty against defects is also included.