Use this low-cost meter with pins for a quick moisture measurement in building materials such as wood, plaster, concrete, roofing, and insulation. A protective cap doubles as a calibration CHECKER. Pins provide 3/8 (1 cm) penetration for testing soft materials such as soil, paper, or powders. Simply replace the pins when they wear out. Features full- and low-battery indicators. What's included: protective cap and one 9 V battery. A must tool for woodworking, building construction, and home inspection check for moisture in carpets and subflooring great for identifying leaks in roofs, floors, and walls 10-led dual-scale readout provides accuracy within 1 percent .