Features Aluminum Alloy The whole body is made of aluminum alloy, the appearance is anodized, has high hardness and is very durable. HIGH ACCURACY The ruler adopts marked hole design. The hole position and diameter of the hole are accurate to 1mm, convenient for marking and measuring the length and improving accuracy. MULTIFUNCTIONAL The aluminum alloy right angle scribing ruler can draw circles, scribe lines, draw hinge holes, measure angles and anything else. 4 HOLE DESIGN The handle adopts a 4-hole design, which is more ergonomic, the tool easier to grip and improves the overall appearance. Small Error The aluminum alloy right angle scribe squares adopt high precision laser scale, which is accurate and easy to read and has only a small error. Specification: Item Type:Aluminum Frame Woodworking Angle Material: aluminium alloy. Metric scale: approx. 300 mm / 11.81 inches. Base opening: approx. 20 mm / 0.80 inches. Base length: approx. 180 mm / 7.10 inches. Bow diameter: inner diameter approx. 40 mm / 1.57 inches, outer diameter approx. 60 mm / 2.36 inches. Package list: 1 x woodworking angle with aluminium frame. 1 x wrench. 1 x user manual (English language not guaranteed). Note: Adjust the correct size before use. Package List 1 x Aluminum Framing Woodworking Squares 1 x Wrench 1 x User Manual