- Dual measuring jaws and probes enable precise measurements of inner diameter, outer diameter, depth, and steps. - Measurement range of 0-150mm ensures versatility for a variety of tasks. - Effortlessly switch between inch and millimeter modes with a single touch, catering to your preferred unit. - The extra-large LCD screen provides clear and easy-to-read measurements, reducing the risk of errors. - Convenient power management: press the switch button to turn on/off, or pull out the ruler to activate. Automatically shuts down after 5 minutes of inactivity to preserve battery life. Ideal for: - Mechanical engineering projects requiring accurate dimensions. - Woodworking and crafting where precise depth measurements are crucial. - Home improvement tasks, such as plumbing or installing fixtures, where both inner and outer diameter readings are needed.