I’m sure many of you already know about these sockets, they are for “buggered up” and rounded bolt heads. I was in the process of removing an exhaust gas recirc valve and all it related componets (junk) on my old 1992 Toyota 4x4 truck. Between the power steering pump and air conditioning it was next too impossible to remove a lower flange 12mm bolt. After four different attemps over a period of two months, I finally bought a set of 3/8 drive special sockets for removing damaged bolt heads. I’m not crazy about Auto Zone, but that’s where I found them. The 12mm socket worked great. I would have bought a 1/2 drive drive, but the lowest it went was 13mm . Here is a photo of my old and new Toyota 4x4 trucks. Notice the difference in size of a 2017 Tacoma 4x4 and a 1992 4x4. The old one is more fun to drive, but it didn’t come with a computer. 270,000 miles on the ’92 and still going strong.My Bugeye is in the garage.