Solid cast iron with rubber coatingExercises all major muscle groupsHelps to increase strength and enduranceIncludes four single kettle weights; 5 10 15 and 20 lbs. 2-year manufacturer's warranty. Add a whole new dimension to your circuit training routines with the Marcy 50 lb. Kettle Weight Set. Made of solid cast iron with rubber coating this weight set targets all major muscles groups as it helps increase your strength and endurance as well as burn fat and lose weight. Includes one each of 5- 10- 15- and 20-pound weights. About Impex FitnessEstablished in 1980 Impex Fitness is on the front lines of innovation in today's health marketplace. They specialize in home fitness/smith machine style equipment that appeals to the whole family and offers a complete workout experience. Impex encompasses a variety of brands including Marcy Competitor Hers Easy Outdoor and Gym Dandy for children. Your family's health as their highest priority Impex Fitness strives to develop the most pioneering fitness equipment available.