Setting aside junky vs quality tools just seconding the point that a 3/8in. square drive tool or extension is risky for this job, as noted here by Nicholas, now in bold. I think I see some references to using a 3/8in. square drive in other posts. Not the best.
On our doors you may need so much torque that only a 1/2in. drive setup will do.
Ask me how I know.
Again, we are talking about a 3/8in. allen key being torqued by a 1/2in. square drive setup.