Pencil Sharpener Made of Wafer Razor Blade
This tool combines a knife and a file in one handle, of wood, 7 in. long. The knife is a single-edged safety-razor blade, clamped to the handle by two round-head screws. A space, ¹⁄₈ in. deep, under the blade is allowed for chips, and a piece of a fine file is recessed into the other end of the handle. To use this sharpener, hold it as a pocketknife is ordinarily held in whittling. The blade will keep its edge for a considerable time.—Ralph W. Hills, Madison, Wisconsin.