While opening my Mac Mini to add RAM and replace the hard drive I dropped two screws. They rolled under the couch to be lost in the dust bunnies. The hard drive screw was only about 2mm in size. My old eyes weren’t up to spotting the tiny thing. I found my magnetic pick-up tool, extended it and swept it under the couch. Click! Screw #1! Another minute of sweeping. (Shoo away the dogs.) Click Screw #2! And THAT screw is almost microscopic.
I had no idea the tool has an LED light on it. That was a pleasant surprise. It helped me see down the recessed screw holes.