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Seemingly such a simple mechanism, the wrench is arguably the most mechanically intriguing of all the hand tools. As one of the still affordable collectable tools, it remains fascinating to both serious collectors and students of the history of technology. With literally thousands of different wrenches manufactured, this is a tool that pushed technology's limits in the most amazing ways.

Here is the first book ever to identify the hundreds of American wrench makers and their products. The author's research has allowed us to trace the location, history, period of operation, and models of each maker. The book includes, as well, an exclusive wrench identification system that cross-references patent dates and trade names (often the only marking on a wrench) with the actual maker. Hundreds of period illustrations help identify unmarked and poorly marked wrenches

As with Cope's earlier pioneering works on American machinist's tools, this book provides an extraordinarily helpful reference for collectors, dealers, and researches.

Code No. 008746, ISBN 1931626065