Inch/Metric/Fractions conversion switch Quickly switch among inches, millimeters, and fractional displays to match your plan or part specification. This reduces conversion errors and keeps measurements readable in real time. 2.0 calibration switch Provides an accessible calibration option to help maintain accuracy over time. Keeps measurements reliable across uses and days of work. Automatic On / Off Automatically powers the device on and off to conserve battery life and simplify operation. No manual power management needed during tasks. Easytoread LCD display Clear, contrast readout for fast interpretation of measurements in various lighting conditions. Reduces misreadings and speeds up decision making. Why you need this Improves accuracy: unit and fraction conversion plus a dedicated calibration switch help maintain precise readings. Increases efficiency: autoon/off and a readable display streamline daily measurement tasks. Enhances versatility: supports common measurement workflows by accommodating different unit systems. Use scenarios Woodworking and carpentry: follow plans that specify inches, millimeters, or fractions, and switch units on the fly to verify part dimensions. Metal fabrication and mechanical assembly: crosscheck components with different unit requirements, while keeping measurements readable at a glance. Field service and DIY projects: perform quick measurements on site, calibrate when needed, and rely on automatic power management to extend battery life.