This is the single-Chassis 2 WD Kit, an easy to assemble and use robot chassis platform. The Single-Chassis kit provides you with everything you need to give your robot a fast two wheel drive platform with plenty of room for expansion to add various sensors and controllers. All you need to do is supply is a basic motor driver and power and you’ll be ready to drive.
A simplified version of chassis construction is shown in the image below. Happy Robot Building