The Magneto from Smoktech is a no-nonsense mechanical mod. It allows for 18350 - 18650 batteries and the smoothest switch operation and lowest voltage loss yet thanks to the magnetic switch system. As you'd expect from a good-quality mod, it has 510 threading that allows for lots of versatility and a locking ring that prevents accidental firing. Whether you're a vaping aficionado or you're thinking about getting your first mechanical mod, you'll find the Magneto a pleasure to use. http://www.vapors.com/Magneto-p/sku-258.htm