This is a set of a kettlebell shaft and two plate collars. You can adjust it to your desired weight by attaching dumbbell plates! The black part at the bottom is reverse-threaded, so there's no worry about the weights coming off. (However, please install it correctly. We cannot guarantee it will not come off completely.) There are some signs of use. Please check the photos. Length: Approximately 40cm Weight: Approximately 3.2kg (bar only)