One of the best training tools for a total body workout! The kettlebell is a cast iron weight (in the form of a cannonball) with a handle.
Since 1704 this 'cannonball' has been used in Russia for various training purposes, especially athletes and military personnel used them. Now it is almost impossible to imagine a gym without a kettlebell.
You can train almost everything with a kettlebell: from explosiveness, endurance to strength. This all-round form of training also gives a good boost to the metabolism. Definitely worth trying! Or to use as an integral part in a training program.