google kettlebell and you will see what it looks like.

it is just a weight ball with a fairly hefty handle.  standard size for men starting to use it is 16 kg, but they range in size from about 2 kg all the way to god knows what.

in a nutshell, you swing it aroung various ways.  it is good for toning and elongating muscles, and it burns tons of calaries because by swinging it you not only work the muscles in your arms, but you work many/all muscles in your body because you have to counterbalance the momentum of the weight.

it is a craze in holliwood now, but was originally invented by a russion decades ago. 

checked city centre but no luck.

thanks. 

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"Even a stopped clock gives the right time twice a day." Withnail & I