Caliper 0-180 Degree Round Head Angle Protractor, Multifunctional Stainless The product is shipped based on the color or size of the main image of the product page. Durable Stainless Steel: The angle measuring ruler is made of high quality stainless steel, easier to identify the precise angle, the product surface is polished, smooth, anti-rust, and can be used for a long time. / p Multifunctional design: 2 in 1 stainless steel angle ruler, can accurately measure the angle in the range of 0 180, and quickly and conveniently measure the length. Measure ADJUSTABLE: The protractor arm locks in the desired position with a knurled nut to quickly and easily identify angles. Scope: very suitable for student drawing, DIY work, architectural design, carpenters and carpentry hobbyists to measure bevel and length. Scope: very suitable for student drawing, DIY work, architectural design, carpenters and carpentry hobbyists to measure bevel and length.