This handy little device is super helpful when working with the tiny metal screws that Tiny Whoops use. This magnet can either make your metal tool more magnetic or less magnetic just by touching the tip of your tool in the correct side. When you are building your drone it is so annoying when the screws fall off the tip of you screw driver and get lost into the ether but now you can make your screw driver more magnetic so you don't lose those little screws. This can also make your tool less magnetic if you find that its picking up too many screws.
"I use this tool all the time while building. I find that you can "tune" in the magnetization of your tools so they can pick up one screw at a time." ~ Nightwing from Tiny Whoop