This thing is awesome. If I didn't have one in my hand, I'd never believe what the manufacturer has
packed into this completely ordinary-seeming nut and bolt! Unlike some other reviewers, I have NO
noticable noise from this thing, and after experimentation, I've learned to get some control over
the speed of the nut spinning by the way I hold the bolt to activate it. Have not used it on an
audience yet (received it last night), but after careful routining, and as part of a PK / mentalism
/ metal bending act, I expect this to make spectator's jaws drop to the floor.