Aluminum 45 90 Degree 3D Protractor

Made from rust-resistant aluminum, this protractor is lightweight yet highly durable with excellent hardness for long-term workshop use. It measures up to 112 mm (4.41 inches) with laser-engraved metric graduations for precise, fade-resistant reading. The tool converts between flat and 3D configurations using a screw-and-hex-wrench mechanism: when secured, it functions as a rigid 3D multi-angle measuring aid; when detached, it serves as a standard square and miter triangle ruler. Its hollow-grip design provides secure handling across wood, metal pipes, and marble surfaces — ideal for measuring, marking, and alignment tasks in carpentry, engineering, and construction.