The SupaDupa StudFinder from AMF Magnetics is manufactured using Neodymium, a rare earth magnet capable of holding up to 25kg.
The StudFinder is a simple tool designed to locate metal backing plates through 20mm of plasterboard and features a thick plastic sheath for protective purposes.
Stud finding magnets are designed compactly and can be carried in the pocket. Very versatile in application, the powerful magnets feature an eyelet through which a chain or length of wire can be attached for fishing out small steel objects from deep holes or confined areas.
The Stud finders can be used to keep electrical cables off the floor and as a lifting device for lightweight pieces of metal.