Drywall T-Square Base Length 22 in Base Width 1 1/2 in Blade Length 48 in Blade Width 2 in Blade Material Aluminum Graduation Mark Style Printed Graduation Marks - Base 1 mm Graduation Marks - Blade 1 mm Specialized Scales Not Applicable Base Material Aluminum System of Measurement SAE Square Type Drywall T-Square Coating Anti-Rust Edge Style Square Features 5-Rivet Construction Finish Anodized Graduation Color Silver Straightness Tolerance +/- 0.005 mm Thickness 0.12 in