Do the higher end truck brands not pull the extension out when you use them? It's for this reason I bought locking extensions. Don't have a problem anymore.
I've not had any problems with my Snap on plug sockets using them with regular extensions.
The best made sockets that always feel the same and work the same is Lock It Sockets. The only tools the make are Spark plug sockets Locksocket.com is the web site they make hands down the best sockets.
I use the standard craftsman plug sockets with the rubber insert along with my locking extensions. Works great and if the rubber part ever falls out, you can just warranty the socket.
I use an air wrench with impact sockets to tighten my spark plugs
I use an air wrench with impact sockets to tighten my spark plugs[/QUOTE
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These seem fairly interesting, how does the mechanism work? Any close up pics?
I just periodically give a light squirt of silicone lube on the rubber insert of mine, not too much but a little bit and it still holds the plug in place but comes right off with the extension.