I’ve been asked this question a lot by people who used to come to my classes or have had training with me using them, So here it is a little brief over view.
Now, you don’t have to spend a fortune or buy commercial competition grade kettlebells. However, PVC and half coated ones are no good.
Make sure they are made from one cast (ie cast iron or competition kettlebells) if you are going to be swinging them. What this means… some of the cheaper kettlebells are made from two casts (one for the handle and one for the bell), these are then soldered together and have some sort of full or half coating (PVC or Vinyl – as pictures below). This creates a weakness that with each use can become greater.
These are very dangerous. I have seen an awful accident happen a few years ago in a class i attended where others were allowed to use there own kettlebells and it snapped during swings. So just double check the manufacturer.
There are a few other things to consider too, like the width of the handle too. For the kettlebells that increase in size with weight (Competition one’s do not as they are a set larger size regardless of weight), the handle should also increase in thickness accordingly.
https://wolverson-fitness.co.uk/ – I’d highly recommend after purchasing my own competition kettle bells, weightlifting equipment for the club and other small equipment for my self of them.