magnetic earth lead welder!

[Tino]

I have always avoided them. I've had enough problems with magnetism causing arc blow without sticking magnets on the job.

 

[brightspark]

Same as the contact switch on a magnetic toolmakers vice on a surface grinder, the knob must turn the core?

who u calling a knob

 

[Sean]

wrap it in a thick plastic bag to stop swarf sticking to it.

hmm not thought that one through