It is an excellent tool for conducting non-invasive inspections of small areas, like looking in the combustion chamber of an engine through the spark plug hole or the inside of a wall without damaging the drywall. The TESLONG NTS300 industrial endoscope with pistol grip and pivoting 5.0-inch HD screen can be used for mechanical inspection, car repair, plumbing fixes, electrical installs, house DIY, wall upgrades, HVAC maintenance, and more. High-Resolution Dual Lens Inspection Camera