Rock Auto magnets

I have them in several different places, some on my toolbox, some on the compressor, some on the side of a small cabinet of nuts and bolts, some on the side of the filing cabinet in our computer room, and a couple on the fridge.
Only problem I have ever had was shorted one spark plug about 10 years ago. I called the number on my receipt, they apologized profusely and sent me one by express post next day.