Empire 419-48 Heavy Duty Adjustable T-Square, Aluminum, Silver, 48" LThe Empire Adjustable T square has a heavy duty, 1 4 inch thick blade and features an adjustable head that can be set at 30, 45, 60 and 75 degree angles. Highlights: Length : 48 inch Thickness: 1 4 inch Material: Aluminum Color: Silver Design: Heavy Duty Adjustable: Yes Head adjusts to any angle and is marked with 30, 45, 60, and 75 degree angles Super heavy duty 1 4 inch thick blade Anodized aluminum finish with easy to read numbers and graduations