Features: Premium Quality: Made of fine aluminum material lightweight and strong. Each ruler were thickened corrosion-resistant high hardness durable. Unique Design: Designed to clamp boxes photo frames etc. to assist in squaring during the gluing process. Also useful for hobbyists home builders manufacturers DIY lover and artists. Clear Scale: The surface scale of the ruler body is clear wear-resistant does not fade and has a long service life. There is a common rafter conversion table on the ruler for clear conversion. Smooth Surface: Each ruler of the triangular ruler and each edge of the ruler are polished by a special process which is smooth and does not hurt your hands and is beautiful and generous. Quality Assurance: Our product will definitely win your heart with its premium quality! If you have any inquiries please contact us. Specifications: Material: Aluminum Alloy Diagonal length: 255mm Notice: Actual color may be slightly different from the image due to different display and light effect. Please allow 1-3cm deviation due to manual measurement. includes: 1*Triangle Ruler "