At Ludwig Precision, we take pride in the quality and dependability of each of our products. Our high-quality line of rulers, t-squares, straight edges and drafting triangles is great for professional and academic use in drafting, drawing, art, picture framing and cutting. We use high-quality extruded aluminum, cut to exact specifications. Each product is printed using precise imprinting techniques to create measurement tools that you can trust for years to come. Visible calibrations and large numbers make for fast and easy length-of-item measurements. Finally, the Metric and English calibrations allow for flexible use in any situation. This aluminum metal T-Square is a straight edge with durable plastic head that is a quality tool for measuring, cutting, picture framing and drafting. Standard-duty T-Square features a 1.5andrdquo; x 1.66mm extruded aluminum blade. T-Square blade is made from high-quality extruded aluminum for accurate measuring, cutting, drafting and picture framing. Aluminum metal T-Square blade is calibrated in both inches and centimeters for flexibility in drafting, measuring, cutting and picture framing. Drafting T-Square features large numbers printed using precise imprinting techniques that will not rub off over use and time. You can be assured that when you buy a Ludwig Precision product, you're getting the very best.