DWC Cast-Iron Kettlebells (50 - 90lbs) for Functional Training and CrossFit Movements, Uncoated Durable Kettlebells made of Cast-Iron. Available in all sizes from 50lbs to 90lbs Commercial grade certified for heavy use in all types of gyms (Crossfit, etc) Perfect for full body exercises such as swings, get-ups, clean and jerks, snatches, squats, etc Use for strength, cardiovascular and flexibility training 60-day limited manufacturer's warranty