General Tools MM1E Moisture Meter, Pin Type, LED Bar Graph MOISTURE DETECTION - Can be used as a water leak detector after flood damage, or general water damages, determine the moisture content of wood and other building materials, or check water damaged areas to see if moisture is still present PIN-STYLE: Stick the stainless steel pins into the surface of what you are measuring in order to get a read-out of moisture present. Pin length is 0.2 inches (5 mm) EASY TO READ- Moisture meter features a 10-LED display for quick and easy viewing; ergonomic size fits in one hand PREVENT MOLD- By checking suspicious water stains with a moisture tester around the house, you can determine whether the area is wet (a perfect breeding ground for mold) or has long since dried ESSENTIAL WATER DAMAGE TOOL- Ideal for homeowners and contractors to measure moisture content in wood, drywall and subflooring NEVER BUY WATERLOGGED WOOD AGAIN- Handy woodworking tool to measure the moisture content of wood before buying 10-LED graph display Two measurement ranges Protective cap doubles as calibration checker Full and low battery indications CE and RoHS approved