I am a fan of mechanical wands.
There are a number of reasons for this not the least of which is that I have been playing with violet wands for years, and once upon a time mechanical wands were the only option. Now that there are solid state generators there are lots of options, this is probably my favorite of them. The Mjolnir Hammer is a Violet Wanda product sold through the Mjolnir website which has some issues but it worth the hassle. One reason that I am a fan of Wanda’s stuff is the lifetime guarantee on the generators that she sells.
There are a lot of things that make the hammer a superior mechanical generator and the one that I appreciate the most is the longer run time. But I also appreciate how the high end output of this generator exceeds the high end output from a BD-10 type generator. The hammer is advertised to have a four hour run time, this exceeds my personal experience but compared to the BD-10 generators they are amazing and can run for much longer. I typically switch out generators at about the 1 to 2 hour mark.
One option that I highly recommend but I didn’t get when I got my hammer is the universal collet. This is a special collet that allows you to use almost every probe out there. It will allow for using: 10 mm, 10.5 mm, 7/16th,
11 mm, 12 mm probes which covers everything that I have ever seen. Another awesome feature of this generator is the is has a built-in spark gap providing for extra safety in the event of a catastrophic electrical line event.
Link if you want to buy one