Every piece in this set came off the pages of an actual 1947 Lufkin catalog, the kind that sat on a toolroom bench back when tools were built to outlast the men who used them. I've spent over forty years around precision measuring instruments, and these illustrations are some of the finest technical drawings ever printed, clean, exact, built to teach a machinist how a tool worked before he ever picked one up. Four different Lufkin pieces, four different coasters, each one a small piece of American manufacturing history under your coffee cup. Made from Masonite hardboard with a cork back, 3.75 by 3.75 inches, built to actually hold up to hot and cold drinks rather than just look nice on a shelf.