Over the years I suppose I have bought lots of stuff, mostly furniture, that needed some assembly. You know the stuff. Comes with little wrenches and inscrutable instructions is several languages. I have been tossing the little wrenches in a box (in case I ever need them). Not sure how many I have now. I should probably throw these out since I have multiple full sets of metric and US wrenches these days. And most of the furniture I assembled with these over the decades is probably long gone.