There are 2 pieces: one the megnet can directly touch the wall.

来源: 于 2013-12-02 14:52:28 [旧帖] [给我悄悄话] 本文已被阅读：次

This one is good, and using only the magnet side, not the metal side. Another the magnet cannot directly touch the wall, it's not good as a stud finder.