
Works great for detecting leaks behind the wall. We use them to inspect properties before we buy them and it has been very accurate. This is significantly better than moisture meters, which require you to drill holes in the wall.

π Johnson Level and Tool 400EM-S 12-Inch Heavy Duty Metal Combination Square for Professionals, with Inch/Metric Measurements, Silver - 1 Square
8 Review

Kapro 307-08-TMS Try And Mitre Layout And Marking Square With Stainless Steel Blade, 8-Inch Length
18 Review

β Stainless Steel L-Square, Size 3-Inch x 4-Inch, Zona 37-434
8 Review

Kapro - 353 Professional Ledge-It Try & Mitre Square - For Leveling And Measuring - Features Stainless Steel Blade, Retractable Ledge, And Etched Ruler Markings - 12 Inch
23 Review