Strong little magnets. I use these to get my 40ft, 48ft and 53ft N scale intermodal container to stick together and just align 4 magnets on the inside faces of the top and bottom. The HO scale may require 3 magnets or more magnets per surface. I was going to use these for the Xwing miniatures, but the plated finish is difficult to pierce (I bought K and J Magnetics 421 ring magnets instead).
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