I was able to fit my Sears 3/8" drive torque wrench on 3 of the 4 plugs. The 4th was done by hand. IIRC, it goes to 10 ft/lbs.
Just FYI, before I had the 3/8 wrench, I used my 1/2" Sears to torque strut top studs to 15 ft/lbs even though the scale stopped at 20. I just turned it down 5 more lbs using the scale graduations and then checked using a 15 lb weight, a ruler, and bench vise. It was still acurrate at 15 ft/lbs.