If you spend any time under the hood or under your car, every time you remove a bolt it's usually dirty, maybe greasy and sometimes a bit rusty. You don't want to spin that back into the hole after you've put all of that work into your repair, so you grab a wire brush and try to clean it up or maybe you take it over to that wire wheel on your grinder. Either way, it's a little hard to hold the bolt and get it clean all around, you would think there should be a simple way to do a task that's so common. Thread Wizard might be just the thing.
These are on display at SEMA this year among the shop tools and if you're restoring a classic car or just doing a little regular maintenance on the lawn mower, these could be really handy. They come in 2 versions, red for SAE threads and blue for metric. There are a series of holes to match a range of bolt sizes through the metal cover. Under the metal cover is a wire brush. You just spin the bolt into and out of the appropriate hole and you've got clean threads. Quick and easy. You don't need a brand new bolt every time you take one out and this could make reassembly a whole lot easier, too. Pretty neat.