Looks as though you've cut off the business end of a 12-pt socket and welded it to a socket adaptor (1/4" or 3/8"?). What vehicle was it designed de-sensor?
I'd love to hear a few more details...
It's a 1/2 inch drive 7/8 inch socket. I sawed it more or less in half and welded the two halves side by side. It fits the exhaust sensor on a Crown Vic 5 liter. The sensor is near the rear of the passenger side exhaust manifold and somewhat difficult to reach effectively. The sensor was also stuck pretty tight. I wanted to use a long breakover for more leverage but didn't want to cut the leads off the sensor. The breakover still didn't loosen it so I used a punch and hammer to assault it fully expecting the weld to fail. To my surprise the sensor unscrewed from its well. Sorry for the quality of the picture. The camera I used was old and not very high resolution.