Kettle bells are great for a variety of strength training exercises, but not all require the same weight. So instead of spending a small fortune on a whole set, just pick up a PowerBell ($200-$250). This ingenious training device uses a set of weight plates that can be easily removed and reconfigured to create the ideal weight for your current exercise — from 5 to 20 lbs. or 10 to 40 lbs — saving you precious space in your home gym and a whole lot of cash.
