We recommend using the M4 steel mounting screw to mount IG42 motors.
This is an Enclosed 4-wheel drive remote control robot kit. It uses four powerful wheelchair motors and the inside robot cavity has plenty of room for electronics.
Indoor GPS Starter Kit featuring one Modem and five Beacons to get your project running. Accurately position your robot to a couple centimeters indoors! Kit includes one modem, 4 standard beacons and 1 beacon with built in IMU.