This nail finder works well, I've used it on plastered walls that had a half inch of drywall on top. Found all studs with absolute precision. It can be finicky, but all you have to do is reset it. I had a zirconia finder and it works just as well if not better. The only thing I don't like is that the power button is at the top. I kept it in the original packaging with my tool (household electrician) but sometimes in transport it shifts and turns on the spike finder.
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
Triangle Group TR918 225/45 R18 95V summer
61 Review