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The light bulb should be an LED controlled by a variable potentiometer.
As it is now you can't get a consistent brightness pressing the button. Read more
If you have a need to go around corners, or bend the end for more visability, better go for a more expensive one. Read morePublished on April 10, 2013 by Don K
I bought this for inspecting my cylinders. It worked fine on a DOHC engine. Not so well on a small block chevy with angled spark plugs. I couldn't see 60% of the pitons and walls. Read morePublished on February 9, 2013 by Steven Marton