Industrial Revelation by Jamie D. Grant

This to me is more of a collector's stuff than a real worker. It looks fascinating and is easy to perform and the revelation of a solid block is baffling - but I am still not convinced that the block can be closely examined and a tight pull may reveal the secret. I would still keep this in my collection and use it occasionally for friends & family.

Monster magic is a super fantastic magic shop.
Very friendly and really fast shipping. 5*** 10/10

MonsterMagic currently have the best price anywhere for this effect. Its similar to the old matchbox trick using three nails only its been updated for modern day since we no-longer use matches.
However personally, I miss the old version which was smaller, making it easier to carry and weighed much less.
Another difference is the maintenance. The matchbox version worked slightly different allowing three solid thick nails to penetrate (rather than just one paper-thin note) and because it was smaller, the seam is completely invisible. This version being bigger means it will need cleaning every now and again to ensure it goes unnoticed. This is covered in the tutorial in some detail using white spirit, but is not mentioned anywhere in the product description. The number of cleans it will need will depend on how you transport it, as for how much pocket lint it picks up.
Its good for a mini-cabaret show performance. However I wouldn't use it walk-around as resetting it between performances is an issue. You will also need an excuse to have a folded banknote in your act, which is becoming harder to find since less people carry cash and those that do, have plastic notes which are harder to fold.