These just may be the best invention since sliced-bread.
The amount of uses is staggering and we cannot even begin to list them all here. The most obvious for our keebers is using these on your boards and cables. Not only will this allow super quick connect and disconnects of your cables, but it will save your precious PCBs, Pro-Micros, or whatever else you have these plugged into.
Super simply installation: the smaller end goes into your device and the larger one goes onto your cable (see photos for more information). Viola. Magnets. How DO they work? :-)