Triangle Scribe Notch End 90 Degrees Scribe Notch Start 0 Degrees Includes Measuring Scribe Notch Graduation Marks 1 in 1/2 in 3/4 in Square Size 10 in Square Material Polystyrene Graduation Marks - Base 1 in 1/2 in 3/4 in Circular Openings 1/4 in Graduation Marks - Blade 1 in 1/2 in 3/4 in Circular Openings 1/4 in System of Measurement SAE Coating Clear