The CAP Barbell SDK5 Competition Weight Kettlebell sets the bar high for kettlebell quality. Each kettlebell is made from solid cast iron and the weight is accurate to within 1%. Each kettlebell is then machined and powder-coated, creating a seam-free surface with a texture that is both comfortable and easy to grip. The wide, flat base will ensure that your weight rests firmly on the ground without rocking. Each kettlebell is color-coded for easy identification and sorting and the weight is displayed in both pounds and kilograms.