Lexwallm 
Scrap yard magnets come on a chain for a reason..
The yard we dealt with in B.C. gave out awesome teeshirts
Yard in Winnipeg has a daily self serve lunch buffet. Cold cuts or hot dogs.
Using the chain on your magnet as a pendulum will detect paramagnetic and diamagnetic metals. And I'll bet most scrap yards today don;t know this but carry on old traditions, the old Jews knew how to use a magnet.
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