What tools would you bring with you when touring a potential flip?

[Kyle Hess]

I'm building a list of tools you could have handy while touring a potential fix-and-flip. 

Is there anything you would add to this list?

Flashlight
Tape measure/Laser measure
Paper/Pen/iPad
Binoculars
Receptacle tester
Level
Marble
Drone
Respirator/Face Mask/Eye Protection/Gloves
AQI tester
Water pressure gauge
Thermal camera
Endoscope camera
Knife