Review on SPS39 Drive Spark Plug Socket 9 by John Destruction

Rubber insert holds very well. So good that my 3/8" extension fell out of its socket when I tightened the first plug. On the next try, I gently pulled the socket out of the plug and it separated perfectly. I'm kinda glad I didn't have a 20 -dollar iridium plug has to break and drop from a looser insert so I don't mind it fitting properly The hex end and knurling might be useful to someone else but as the socket is so short and my plugs are so deeply recessed , I have not used these functions myself.