Angle Ruler: Our construction protractor features both length and angle measurement functions. With an adjustable thumb nut, once tightened, it allows for easy measurement from 0 to 180 degrees with clear angle readings. The ruler provides accurate length measurement from 0 to 30 cm (0 to 12 inches). This tool is ideal for individuals working in carpentry, construction, and engineering. Adjustable Protractor Arm: The protractor angle finder includes center positioning and scribing capabilities. The adjustable nut enables quick and precise angle identification and straight line drawing by locking the knurled nut in the desired position. It is suitable for setting bevels, drawing exact lines, measuring, and marking angles. High Quality Protractor: The body of this adjustable woodworker's ruler is made of aluminum with laser-engraved measurements for clear readability and long-lasting durability. With a thickness of 2 millimeters, the ruler is sturdy and reliable. This tool offers precise and durable performance for various measuring needs. Multipurpose Use: The adjustable angle protractor is suitable for engineering, angle measurement, student drawing, architectural design, and length measurement. It is a practical tool for craftsmen, designers, artists, and engineers. Specifications: - Ruler measuring length: 0–30 cm - Protractor measures degrees: 0–180 degrees - Size: 304 mm x 100 mm - Material: Aluminum alloy - Color: Black + silver Package Contents: 1 x Protractor Angle Ruler Note: Light reflection and differences in display screens may cause slight variations in the color shown in the image compared to the actual product. Measurement may vary by +/- 1–3 cm due to manual measuring.