Review on Premium 24-Inch Ludwig Precision Heavy-Duty Aluminum T-Square: Ideal for Art, Framing & Drafting Projects by Sandra Johnson

For the money I definitely don't expect perfection. But that T-square wasn't rectangular (3/16 is over 24 inches) and the blade itself wasn't straight. I've tested it with the new Starrett ruler, the new Starrett combination square, the technical trial square, the large metal ruler, and hand-drawn a line and flipped it over. Because the railing on this T-Square is plastic and held together with cheap aluminum rivets, it is not adjustable. So basically useless. I sincerely hope that students who get one of these will have better luck than me. Otherwise, they will be very disappointed in their drawings.