You need a set of these- even if you think you don't. Once you get them you'll toss them in your box and forget about them. The day will come when you have to stack a couple of extensions and their worth will become evident. Tired of pulling your plug socket off with a pair of pliers? You need the 3 piece 3/8 inch Drive Quick Release Extension Bar Set. There are some that are concerned about the use of plastic in the construction of this item and the possibility of dirt, grime and grease having an ill effect on the release of the socket. Based on my experience it has not created a problem or been a concern.
I bought the extension set from a local sears outlet and was disapointed on the first use. I attempted to use the extesion set to change spark plugs when I got debris in the quick release mechanism. The mechanism jammed and would not hold a socket in place. It was a chore to clean the mechanism of debris and considering that the use of the extension set would involve more than spark plug removal I decided to return the set after one day of frustrated use. I bought a simple extension set that did not have the quick release feature, and I am happier due to fewer jams. I prefer a hand tool I can use under difficult conditions with minimal maintenance and is still capable of functioning at it's orginial capacity, which does not apply to this set.
Really good addition to my toolbox. Excellent for spark plugs and anywhere else you might lose a socket off of an extension.
These tools prevent loss of socket when removing from fasteners. Especially helpful retaining spark plugs after removal from recesses in engine heads.