While I have a couple fancy and expensive kits, I often just reach for the unnamed yellow plastic-handled slot screwdriver that came in my S&W revolver armorer kit. The slot head is exactly the size needed. I'm guessing it was very inexpensive.
If I'm not in any hurry, I'll get out one of the drivers from one of the fancy kits, and change slot head tips to be ... cool.
FWIW, learning to guide the tip to the slot, and keep it centered, using the edge of a support thumb as a 'guide', is helpful.
Whoever assembled my first M&P 340 apparently had their driver slip at one point. The black finish of the frame looked fine, until I wiped the R/side, around the yoke screw, when cleaning it for the first time. A bright shiny 'ring' was revealed around most of the edge of the yoke screw hole in the frame.
My guess is that the assembler grabbed a handy black marker to cover the 'blemish'
, and then boxed it up. I'd bought it as an off-duty weapon and range beater, so I didn't call about it. Sloppy, though. It has more nicks, scratches and dings on it nowadays.
