• A set of it weighs between 1.4 and 1.5 ounces. A set includes three 65mm magnetic barrels with magnets contained in the ends of each barrel. They are 15mm round making it comfortable in the hands. High strength, rare earth neodymium magnets are used to hold the barrels together in somewhat of a pen spinning configuration while still being easy enough to break into 2 or 3 parts where it can be used as a very unique, magnetic skill toy.