I've been using Snap-On PPM-410 5/16" Male Pipe Plug (7.94 mm!) and a 12" breaker bar. The Snap-On truck I flagged down several years ago had it on the truck! Bob Vin 17015 http://www.DeLoreanMotorcar.com --- "David Swingle" <dswingle@xxxx> wrote: > OIL drain - Snap-On PMM-408 Male Pipe Plug socket 8 mm > > BTW the trans drain tool is a PMP-410 Female pipe plug socket 10 mm.