Fulfills its purpose, but has room for improvement

I have already Magnetolink, magnetic attachments for smoke detectors in use and have the 3-he bought me set as a reserve.
Two devices are me already fallen from the ceiling, which has led to the destruction of the device (no na!).
There each one magnet from the plate and have solved a magnet alone just is not enough.
Repair is easy by using super glue (do not forget to degrease and roughen if necessary some) possible.
Potential for improvement is possible, a third Magent would be helpful.