Calculated Industries 7445 AccuMASTER Duo Pro™ Pin and Pinless Moisture Meter is a versatile tool for woodworkers, builders, and homeowners. It accurately measures moisture content in wood, building materials, and concrete. Use it to find leaks, check firewood readiness, select dry lumber, and more. Its pinless mode allows for non-invasive moisture detection up to 3/4" deep. The large backlit LCD display with hold function and audible beep make it easy to use in any environment.