The kettlebell is often described as a cannonball with a handle. That is quite true of the traditional cast iron kettlebell but not of the newest models, which come with rubber- or vinyl-encased bells and steel or molded synthetic handles.
When choosing a kettlebell, evaluate your training environment and needs. If you will be working out indoors, consider using a kettlebell with a nonabrasive shell or a rubber plate on the bottom to prevent damage to floors and reduce noise in group environments. Look for a kettlebell or kettleball with a smooth-surfaced handle so it rotates easily but does not slip.
