Borescope works great! - Teslong NTG100-C 45-Inch Flexible USB-C Borescope

Bought this to check alignment for installing my gas block. Works perfect for that. Clear visuals, adjustable light, and different size options for mirrors to get angled views.

Advertised as a borescope, the internal packaging refers to it as an endoscope.

The scope has worked really well for seeing what’s in the walls of our home, as well, before we do any modifications.