Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 135,172 pages of information and 215,041 images on early companies, their products and the people who designed and built them.

Don Tool Works

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Drury, Brothers & Walker of Don Tool Works, Sheffield, registered a design of adjustable wrench known as a Lock Spanner.[1]


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Sources of Information

  1. The Practical Meachanic's Journal, October 1861