bicycle wrench

— With the boom in the bicycle business [1890s] there came an excellent opportunity for wrench makers, and the large number of "bicycle" wrenches that have survived [1914] make plain how well the opportunity was embraced. Obviously, these bicycle wrenches are quite as useful around an automobile as they are around a bicycle. In fact, their designation now stands for small size rather than to connect them with the bicycle industry. In fact, almost any small wrench now is styled a "bicycle" wrench and some of them are remarkably ingenious.