A really useful hand tool to have on the electronic workbench is an Otoscope.
These were designed to be inserted into the external acoustic meatus to view the Tympanic membrane. They provide a glare free lighting and a good level of magnification with a magnifying lens over the viewing window.
Typically they run from 2 AA cells (the cheap ones) and have either an LED illumination or a "lens end bulb" in them. They provide a great hand tool to use to pick up to examine IC, markings or other surfaces, for many repairs/inspections. I discovered this more or less by accident, that they were a great electronics workshop tool, even though not intended for the application.
The prices of these have dropped down really low over the years, I just looked and saw one like this:
https://www.ebay.com/itm/Mini-Otosco...IAAOSwOxJdn39V
But there must be many more examples on the usual auction sites.