Built fine but not a great design and regret grabbing these for my snodes. That said, I have found a use for them for my wife when she uses the viper so not great for their intended purpose but I found a way to get some use out of them.
Much like the onnit star wars/primal kettlebells, actual performance varies based on exercise. Works ok for swings, everything else is hit or miss but they look cool as hell at that is also important at Mike's Gym.
A 100% Must have for the Fringe Sport Mammoth Belt Squat. You will usually find it bundled with the unit so it's almost always thrown in but please do yourself a favor and confirm that you are getting it because it really is a must have.