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, rust-proof, and can be used for a long time. Multi-functional 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. Adjustable measurement: the protractor arm locks in the desired position with a knurled nut to quickly and easily identify angles Scope of application: very suitable for student drawing, work of DIY, architectural design, carpenters and woodworking enthusiasts to measure bevel and length. Scope of application: very suitable for student drawing, DIY work, design architects, carpenters and joinery enthusiasts to measure the windage au and length.