Size: 300mm x 200mm (12" x 8 ") steel square ruler. Black Powder Coated Finish: Corrosion-resistant finish protects the square in harsh working conditions, ensuring clean, visible markings over time. Metric Markings: Clearly graduated on both sides with metric (mm/cm) for precision measuring in any standard. Built in Roofing Conversion Chart: Includes printed reference guide for rafter cuts, roof pitch calculations and rise measurements, saving time and reducing errors during complex layouts. Applications: Ideal For Carpentry Applications In Framing, Roofing, Stair Work, In Making Layouts And Patterns - Can Also Be Used As Straightedge For Determining Flatness Of A Surface., Manufacturer: CERCTLA