CARTMAN Automotive Oxygen Sensor Socket Set 10PC Socket Set Removes & Installs Oxygen Sensors on Most Domestic & Some Imports Accepts Either 3/8" or 1/2" Drive Ratchet Depending on The Size Of The Socket 7/8" x 3-1/8" Long 3/8" Square Drive; 1 & 1-1/16" Dual Opening x 2-7/8" Long 3/8" Square Drive 7/8" x 3-1/2" Long 3/8" Square Drive; 7/8" x 3-1/2" Long Square Drive 7/8" x 1-3/16" Long 3/8" Square Drive; 7/8" x 1-7/8" Long 1/2" Square Drive