This light bulb changer head makes it possible to safely extract a broken bulb from an unpowered socket. This is a two-piece design allowing for a multitude of different size bulbs to be extracted. Do not attempt to use this product until power has been turned off at the breaker panel for the light fixture with the broken bulb. This head fits the industry standard thread pattern found on our 16 and 11 three-section aluminum poles as well as our 11 three-section steel pole.