A Screw Up?

The weather today has really made me pause and put my thinking cap on;  it's much too wet and far too windy to get a decent macro shot which is why I've been hunting round for inspiration  -  although inspiration might be too strong a word really.  I've chosen these screws because I liked the different types and they seemed to catch the light nicely  -  and of course they're quite small.

I'm not sure who's hosting the Tiny Tuesday challenge this week, Walking Wombat or Osuzanna, but many thanks to  whoever is in charge.