IronBull Fitness 100583 Cast Iron Kettlebell (12 kg)1) High tech "state of the art"gravity casting molding process creates a professional highly durable one piece solid Kettlebell.. Our unique intersection detection process enures quality and reliability. 2) Engineered to be both elegantly and perfectly proportioned for a more consistent workout benefit. 3) Machined flat bottom provides excellent stability and balance. 4) Power coated flat black matte finish provides a durable and smooth coating. 5)