I put together seven top/bottom whorl spindles to sell at our local spinning/game store. I put the length and weight on each one on a custom stamped tag. I consider these student spindles, since the whorls are made from wooden toy wheels. I did shape the shaft with a notch on one end, and a reinforced hook at the other end, so they are fancier than the mass produced versions. Each spindle is also slightly different, which I think it good to appeal to different preferences.