27mm / 1 1/16" six point 3 in deep socket with short extension just the right length to fit into the front pulleys and clear the radiator on most early 6 clyinder, small V8 and diesel engines from the early 1960's up to 1985
Designed by Kent - Now he likes under car fluid changes! :-) Full 20 minute video drain and fill instructions included. Please read important note on the revision made on 3/3/20.