Review on GearWrench 81250 8 Inch Locking Extension by Gabriel Salleh

Exactly what I was looking for. The extension has a good finish and I tested it at 200 foot pounds and it held up great. I have a 6 inch mainly for spark plugs and the red and black ring at the end of the extension really isn't that bulky. It is no wider than the drive socket into which you insert the ratchet. I also found the ring to be no wider than my 3/8 sockets, so if you're concerned about the gap this shouldn't be a problem.