Totaling 420 pieces, this M3 Screw Set is a must-have for your workstation. You'll have enough screws, nuts, and hex standoffs to fuel your maker tendencies for days on end! M3 size screws fit a number of Adafruit breakout/dev board standoffs. Since they are nylon you can file them down easily, and they don't conduct electricity or interfere with antennas/magetometers.