These double square come with 4" or 6" length blades. The blades on these double squares are hardened and tempered. All four edges are precision ground. Graduations have 1/8" and 1/16" on one side and 1/32" and 1/64" on the reverse. The graduation markings are precision photo-etched that are black filled for long life and easy readability. These blades have a satin chrome finish that produces a non-glare surface for easy reading and rust resistance. Angular accuracy is guaranteed to 0.0008 per inch (that's 8 ten thousandths of an inch).
