2 in 1 Digital Protractor - Measure not only length, but also 360 angle (inside angle, outside angle). Locking function Use locking screws to lock both legs in the desired position or angle. Large 1" LCD screen - LCD with electronic digital display, you can switch between degrees and minute with "/" button HOLD button stores data during measurement, ON/OFF/Zero button resets zero data by short press any angle angle lock button to each angle. Measuring angle: 000.0 ~ 999.9 accuracy 0.3 resolution: 0.1 measuring range: 0-360. The body of the ruler is forged from high quality stainless steel, which guarantees quality, corrosion resistance and durability. Excellent quality - The ladder forged from premium stainless steel is laser engraved (scale in mm and inches), resistant to abrasion and corrosion. Sold by the store