The General Tools MM1E moisture meter is ideal for measuring the moisture content of wood and construction materials. It can be used to locate water leaks in roofs floors and walls to check for moisture in carpets and sub-flooring and to make sure that wood and drywall is dry enough to be painted wallpapered sealed or treated. The MM1E measures moisture in two ranges 7% to 15% WME - Wood Moisture Equivalent - and 16% to 35% WME on its 10-LED graph display. Pin length is 0.2 inches 5 mm. The protective cap doubles as calibration checker. It features full and low battery indications comes with an included 9V battery and is CE and RoHS approved. GENERAL TOOLS - THE PRECISE TOOL FOR DOING THE JOB EXACTLY RIGHT. Offering over 1 000 tools were proud to provide tradesmen craftsmen and DIYers around the world with a broad range of affordable specific-purpose mechanical hand tools and precision measuring and inspection tools. For inquiries please contact our Customer Service Department at 212-431-6100. We strive to provide our customers with 100% satisfaction. WORK SMARTER MEASURE BETTER & BE MORE PRODUCTIVE WITH GENERAL TOOLS This dual-range unit is perfect for checking moisture in carpets and sub-floors; analyzing wood concrete or drywall before painting or wallpapering; or locating leaks in roofs floors or walls. The MM1E measures moisture in two ranges; 7-percent to 15-percent WME for wood and 16-percent to 35-percent WME for building materials on its easy to read bar graph with an accuracy of +/- 1-percent.