An indispensable guide to an indispensable tool! Open up any craftsmenﾒs tool box and you will more than likely find a steel square. Itﾒs a standard that has been around for centuries. Yet few actually know how to use this simple tool to its full potential. With Ken Hornerﾒs guide you will learn how to quickly solve endless construction, layout, and geometric problems involving arcs, angles, circles and squaresﾗwith just your steel square. Seventeen chapters cover the history of the tool, different types of squares, problem-solving techniques, how to use the scales on a square, circles, angles, arches and ellipses, cylinders and cones, stairs, roofs, rafters and much more. Also included are several skill-building exercises and rules of thumb. Learning about this most versatile tool is a benefit to any woodworker, carpenter, do-it-yourselfer or even antique tool collector. Whoﾒd have thought that a tool without a power cord could do so much!