This is 2WD Robotics Chassis With Motors Wheels And Accessories V1.0 comes with a quality product. The kit is easy to assemble/disassemble. Now it has become very easy to design robotic smart cars with us. PACKAGE INCLUDE: 1 X 2WD Robot Chassis , 2 X BO DC gear Motor , 2 X Wheels , 1 X Custer wheel , 1 X 4AA Battery Holder , 6 X M3 FF 12mm : Stand off , 4 X M3 30mm Flat top Screws , 12 X M3 8mm Flat top Screws , 4 X M3 Nut.