I received the tacking iron today. K, it's just what I ordered, and the shape of the "foot" will make it easy to get under the corners of the print in order to tack it to the board. But I have to say, this "tacking iron" is really nothing more than a glorified soldering iron (exactly what I had thought it might be) and as such, the Euro 50,00 seems to be more than it's worth.
Had I known this in the first place, I would have gone to the hardware store and bought a regular soldering iron for under Euro 10.00.
Live and learn...But I must say, the service from Silver Print in the UK was excellent. Fast and well packed.