Just picked up my newly sharpened blades from the mower place. The repair guys said "Make damn sure you tighten the bolts right. There's no way to get the required 40 ft/lb torque with a 3/8" drive. With a breaker bar, yes, but not with a 3/8 torque wrench." I have a 3/8" drive Matco torque wrench with adjustments from 10 to 100 ft lbs. It's 18" long, bigger than any breaker bar I have.
What's this repair guy talking about?