Should I be worried about my credit cards or metal tools I have around the shop when I use the magnets?

You should always be careful and keep all metal tools a safe distance away from your working area when using the MDRS™.   10 feet for any computer related equipment, 5 to 6 feet for all other metal objects as a general rule.  Credit cards would almost have to be placed directly upon the MDRS™ to have an effect.

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