Features and Benefits: Easily removes vacuum switches, oil pressure sending units, brake light switches, and oxygen sensors on most car models; CR-MO alloy steel for long life; Fully guaranteed; Heavy duty blow molded storage case; Set includes sizes: 29mm pressure/vacuum switch socket, 7/8" vacuum switch socket with 7.5mm gap, 27mm oil pressure sending unit socket, 7/8" vacuum switch socket with 30.6mm gap, 1-1/16" and 1" oil pressure sending unit socket, 7/8" short oxygen sensor socket and 7/8" hex 1/2" double square driver.