I have used that one some, but much prefer this one made by milwaukee tools

d12ede53-8cbc-4831-bab4-a9a666edff16_1000.jpg
 
Another Good Extension

I like this one. Hold the drill with one hand and the drive in the other. I use a 3" extension bit on the end and can get to a lot of the screws that were hard to reach with anything else.

http://a.co/4sjwXtt

Sorry, couldn't post the photo. My current internet provider (campground) is blocking photobucket.com!