Neoprene Coated Solid Cast Iron Kettlebell 5 10 15 20 25 30 35 40 45 50 LB, Great for Full Body Workout, Cross-Training, Weight Loss & Strength Training. Flat Bottom for Stability: Enable upright storage&floor exercise such as renegade rows, handstands, mounted pistol squats and other exercises requiring a kettlebell with a flat bottom.