Where do you buy your screws?

My vote is also for Mc Feeleys with one exception -- the no-corode variety-- they require an undersize #2 driver. I find they simply do not work well in the longer sizes. For those applications I use GRX torque drive--expensive but are easy to drive and do not cam out or break.

Where Do You buy your screws

I buy all of my screws at my local Do It Yourself hardware. They are the grip-
rite brand and, so far, have not had any problems with snapping the heads. I
did manage to snap off a 1/4" lag screw using my V-18 Milwaukee cordless
drill while trying to drive it into a wall stud!