Features 1、2 in 1 Design: Accuracy etched stainless steel angle ruler for accurate measurements. The adjustable wing nut on the dual arm protractor allows easy angle measurement from 0 to 180 degrees. 2、Adjustable Protractor Arms: Lock the textured wing nut in place to easily identify angle readings, ideal for your basic work and study needs. Secure angles for drawing, setting slopes, radial lines, and angle marking. 3、Versatile: The dual arm adjustable angle protractor is suitable for engineering, angle measurement, student drawing, architectural design, and length measurements, serving as a useful tool for craftsmen, designers, artists, and engineers. 4、Accurate Measurement: This stainless steel angle ruler features accurate markings and a smoothly adjustable mechanism, ensuring accurate and reliable angle measurements for various tasks, from woodworking and metalworking to drafting and layout design. 5、Stainless Steel Material: Crafted from stainless steel, the angle measuring gauge is rustproof and robust, maintaining its shape even under heavy use. Specification Item Type: Stainless Steel Protractor Material: Stainless Steel Measurement Range: 0-180° Package List 1 x Angle Ruler