"It's a practical 2 in 1 ruler. It can be used as a rectilinear scale and goniometer. Made from 304 stainless steel, it offers great durability and abrasion resistance. The large LCD screen is very convenient for reading. If you are looking for a LCD digital display angle ruler, this is your best choice. Features: Using 304 stainless steel, has high durability and resistance to abrasion. 360 full measurement. Simple operation with complete function. LCD display is more convenient for reading. The degree scale is clear and exquisite. Come with lock button, it is more convenient to hold the angle in any position. Features: Material: stainless steel Length: 0-200mm, 0-300mm, 0-500mm (optional) Resolution: 0.05 Accuracy: 0.3 Repeatability: 0.05 Measuring range: 0-360 Protection level: IP54 Working temperature: 5 -45 Working humidity: