What kind of circuit tester do I need?

[Rick-o]

I have several similar to this one. I used them out in the factories during demolition. If I tore out a wall with exposed romex, a quick touch with one of these would tell me if the wire was hot.

Works fine around the house too!

http://www.amazon.com/Voltage-Tester-Pro..._1?ie=UTF8&qid=1454033018&sr=8-1-spons&keywords=circuit+tester&psc=1


EDIT: ROMEX, spell check! NOT rolex!!