The Origin Cast Iron Kettlebells can be added to any weight training programme and are suitable for all fitness levels. However, when added to specialist training such as circuits, they can also help increase endurance and stamina. Muscle groups targeted through the use of cast iron kettlebells include: biceps, triceps, deltoids, rhomboids, trapezius, lats, quads, glutes and core abdominals. Additional Information SKU NTS-CKBV-GRPD MPN CKBV-GRPD Manufacturer Origin Fitness Condition New Materials Powder coated cast iron Weight Range 2-12 in 2kg increments12-40 in 4kg increments Construction One piece cast iron Handle Thickness Increases with weight Warranty Type Commercial Warranty Commercial Warranty Details All Origin products are covered by a 12-month warranty from the day of purchase. The warranty only covers manufacturing faults and defects. Wear and tear is not covered.