If you are in a need of a tuning key, here is your CHEAP choise. It doesn't have a magnet but at the price of 2euros it does not need one. It's very hard material, so it won't break easily. It works well on Millenium, Pearl, Tama and Sonor drums, no problems whatsoever. There is even a tiny hole, so you can wear it in a necklace or hang it on the wall, so it won't get lost.