I have one of these Ikea Grundtal magnetic knife racks. I opened one up, and inside were numerous used computer hard drive magnets glued to the back wall (not that they needed the glue to hold them in place). Nice to see recycled computer parts being put to use.
I fixed a screen door handle with a guide rail from a
full sized hard drive (double height , 8 inch wide,100mb)
I doubt that description means much to anyone, these days.