General description The Carpenter Square Metal Aluminum Folding Triangle Ruler is a multifunctional tool designed for precision in woodworking and construction. With a folding design, it features a 6-inch extension arm that accommodates layout needs of both 6 inches and 12 inches. When folded, it reduces storage space, making it easy to carry. This ruler includes both metric and imperial measurement units for convenience. Technical specifications Material: Aluminum alloy Size (expanded): 310 x 180 mm Measurement units: Metric and imperial Usage Suitable for drawing 45° and 90° angles Can be used for marking slopes and chamfering roof rafter ends Ideal for DIY projects, carpentry, decoration, and construction Other information High-quality aluminum alloy with a matte black finish to prevent glare Concealed stainless steel scriber for easy marking Adjustable positioning tool for accurate angle selection Durable design with corrosion and oxidation resistance