【Aluminum Alloy Material】 Sturdy and durable, this 3D multi-angle measuring ruler is made of high-quality aluminum alloy, ensuring long-lasting performance. 【Slide-to-Mark】 With the aluminum multi-angle measuring ruler, there is no need to flip the tool during measurement—simply slide to mark 45°/90° angles on the left or right side. 【Easy to Use】 The aluminum metric triangular ruler is precise, versatile, and easy to use. Find the hole that corresponds to the scale, insert the pen into the hole, and draw the desired line. 【Applicable Scenarios】 The aluminum alloy triangular ruler is suitable for DIY, engineers, carpenters, and decorators. It is an essential measuring tool for woodworking professionals. 【Wide Application】 This carpenter’s square is ideal for working with three-dimensional materials such as wooden strips, planks, aluminum alloy, marble, steel pipes, sewer pipes, and more.