Flypro,
No Freudian slip on my part......speaking as someone trained to spell and later how use a ballpein hammer before I became a pilot, I have to say:
Gotcha! Ever heard of IRONY?
Although a ballpein hammer is technically made of steely, rather than irony.........
P.S. Ever heard of a metric adjustable spanner? They aren't much different to an Imperial version....