Oooooooh so true.......
SPANNER : A tool which will fit, complete with your hand into any extremely small space which is surrounded by the sharpest engine ancilliaries, and which when undoing a nut will grip and grip and grip untill you are exerting maximum pressure....
At which point it will slide off and remove the skin from all your knuckles, while ripping off at least one fingernail and filling the wounds with thick black oily dirty goo, which will then have to be scrubbed out with a nylon scrubbing brush and fairy liquid because you can,t find the swarfega.
