I got the 8kg ones. Not impressed. The handles have stones falling out every time i swing and put pressure on them with standard exercises with good form. They came defected so feel like it was a waste of money as they wont last. Not going to bother returning them given the current lockdown. Disappointed as the handles are getting weaker with the stones falling out every time i use them. Just going to get better cast iron ones next time i have the opportunity to.