wrote in message
oups.com...
Are the cheap end versions any good ?


http://www.tooled-up.com/Product.asp...tellisensor-St
ud-Sensor-0-77-110

Specifically I want to use them to detect studs behind plasterboard
(1930's house) so I can hang shelves, pics
etc.

Or should I invest in a couple of powerful magnets ?

Thx


They fail when the plasterboard is foil backed. ;-)