1Simpler Testing: Just insert the pin into the target material to help the tester easily test the moisture inside and largely simplify your work. 2Extensive Using: Allows for extensive application in testing wood, paper, construction materials and more for installation, woodworking and more. 34 Pieces in All: There are 4pcs moisture meter probe pin in the set, and the large quantity will surely satisfy all your need for replacement. 4Better Material: Adopting premium iron material with chrome tin plating, the moisture meter testing probe suits perfectly for ZNMT01\02 model. 5Easy to Install: Comes with a compact size and a light weight as well, the dampness moisture sensor is very convenient to install in minutes. 4 xMoisture Meter Probe