yup 15mm for drain plugs on my mustang as well as on my ranger??? the 440's is a 13/16" (insert tool man grunt here)
i only have a few bad purchases...
a drill/bit/polishing stone/driver set supposedly 19.2 volt from menards - needed a drill, never had one, just bought a cheapie thinking it would do...i thought "man, this is great!"....then i got a maintenance job and was given a Skill 18V (supposedly they're not very good???) and it really is great. i've used dewalt, milwaukee, and other brands, but i think my skill is just as good.
second item would be a waxer/polisher like shown above - i'd rather do my waxing by hand anyway.
third item would be one of those dumb 12V cigarette lighter air pumps - it might air up a tire if you left it on all day
fourth would be cheap wire strippers that come in the economy kits at hardware stores or walmart.