"This oxygen sensor socket removes the 7/8 in. oxygen sensor on most foreign and domestic vehicles. Designed with a cut-away slot, the oxygen sensor socket can be used without disconnecting the sensor. Constructed from durable drop forged chrome vanadium steel for rigorous use.
Removes the 7/8 in. oxygen sensor on most foreign and domestic vehicles
Cut-away slot gives clearance for wire connection
Drop-forged chrome vanadium steel
Black oxide finish"
As seen here:
https://www.harborfreight.com/78-in-oxygen-sensor-socket-63702.html