Gearwrench's Sensor and Sending Socket Set is designed for the removal and installation of oxygen sensors, oil pressure sending units, and vacuum switches Includes 3/8" drive 7/8" slotted socket for PVS, TVS and O2 sending units Includes 3/8" Drive 7/8" (22mm) socket for Oxygen Sensor Units Includes 3/8" Drive 1-1/16" Deep socket for Oil Pressure Sending units Includes 3/8" Drive 7/8" (22mm) Low Profile Offset socket for O2 Sensor Unit