Drywall T-Square, Base Length 22 in, Base Width Not Applicable, Blade Length 48 in, Blade Width Not Applicable, Blade Material Aluminum, Graduation Mark Style Not Applicable, Graduation Marks - Base 1/8 in, Graduation Marks - Blade 1/8 in, Specialized Scales Not Applicable, Base Material Aluminum, System of Measurement SAE, Square Type Drywall T-Square, Coating Clear, Edge Style Square, Features Four Rivet Construction, Finish Anodized, Graduation Color Black