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The weirdest tool I own is also one of the most useful (and it's $10 on Amazon)
This small device's HD camera is designed for the ear canal, but I use it as a portable inspection camera.
But they're typically large and bulky, designed for mechanics and HVAC engineers, which limits their usability when it comes to inspecting device ports or probing around cracks and crevices looking for a lost fastener. In my quest to find a small, portable, low-cost camera for confined spaces, I found this one from Amazon, designed specifically to inspect ear canals. Adrian Kingsley-Hughes/ZDNET There is a little metal prong on the end of the unit that takes little silicone sleeves for digging about in your ear canal, and you can choose to keep this or snip it off.
Or read this on ZDNet
