The STEELMAN 05420 42-Inch Flexible Lighted Inspection Tool with 90-Degree Tilting Mirror is the ideal tool for when you need to look into tight and recessed areas. With a flexible gooseneck shaft, this tool can be bent and twisted to reach around objects and obstructions and, in addition, the entire mirror end can be tilted up to 90-degrees to look behind and around objects with the turn of a thumb wheel. To make it easier to identify small parts, components, and details, the mirror features 4-power magnification. The tool also features a rocker switch on the handle that allows activation of the built-in light to illuminate darkened areas. The small bulb projects light onto the mirror so that it floods the work area, letting it brighten a larger area. The light is powered by two (2) AA alkaline batteries which come included for convenience. If damaged or burned out, this light uses STEELMAN 05515 Replacement Bulbs.