For removing and installing the 1-1/16-in hex oil pressure sending units found on 1991 and newer GM and some Chrysler engines. 3/8-in drive socket features a 2-5/8-in recess for switch body. Socket can also be turned with a 7/8-in end wrench on the external hex. Chrome vanadium steel for strength. Meets or exceeds ANSI standards. Lifetime warranty.