Features:Steel 90 degree roofing squareDual markings inches and centimetre， millimetre measurementsIdeal for the workshop， home toolbox， crafts， hobbyists， modellers， joiners ， cabinet makers， carpenter，sewer and wood craftsman， etcGraduated metric & imperial ruleMeasuring Size: 20x30cm/ 8x12"Package Included:1 x Dual Marking Framing Carpenter Ruler