Drywall Scoring Square, Base Length 20 in, Base Width 2 in, Blade Length 24 in, Blade Width 2 in, Blade Material Aluminum, Graduation Mark Style Printed, Graduation Marks - Base 1/16 in, Graduation Marks - Blade 1/16 in, Specialized Scales Not Applicable, Base Material Aluminum, Plastic, System of Measurement SAE, Square Type Drywall T-Square, Coating Clear, Edge Style Square, Finish Unfinished, Graduation Color Black, Straightness Tolerance Not Applicable, Thickness 0.63 in