Engineered with high accuracy light markings and permanent aluminum alloy construction, this adjustable protractor ±0.1° accuracy for corner measurement and layout tasks Ideal for educators, woodworking enthusiasts, and mechanical engineers requiring corner calculation in workshops, classrooms, or construction Its function design serves as both an corner finder and ruler, with numbered gradations in metric units for seamless between drafting and practical applications Perfect for cabinet installation, engineering, and geometry demonstrations where compact portability meets industrial strength measurement capabilities The T shaped metric scale combines a 180° protractor with a 300mm ruler, featuring resistant anodized surfaces and rounded edges for durability and user security, Manufacturer: Kalttoy