1The millimeterlevel precise dial can accurately position the vertical line to reduce errors and improve work efficiency. 2The flexible multimechanism pendulum body has passed strict balance tests to ensure the pendulum is stable and accurate even if it vibrates randomly. 3Low refraction, good light transmission, using optical glass, high light transmission and no other variegated colors. 4The equipment will be selfleveling, put the line level on a more level place, and automatically level within an inclination of <4. 5Multiple protection, more stable performance, protection grade IP54, suitable for wall construction, photo hanging, etc. 6The light source is thin, strong penetrating power, clear eye protection, no blur, no dazzling. The locking mechanism can protect the internal parts, allowing manual mode.