Pocket reference book for contractors, builders, craftsman, handyman or any do-it-yourselfer. 768 pages of hard to find info. on: Anchors, belts, pulleys, bolts, nails, staples, screws, pipe, conduit, fittings, glues & adhesives, paints, solvents, rafter length/span/pitch,weight & properties of materials, welding, tools, math tables, much more than we can list here.