This mobile robot chassis is ideal to get those design juices flowing.FeaturesDouble mounting plate structureLightweight and high strengthLow complexity, Easy to useModular structure, Easy to maintainOuter DimensionsWhat’s in the box?4 x Mecanum wheels (L wheel 2PCS, R wheel 2PCS) 1 xMobile robot mounting plate (large size) 1 x Mobile robot mounting plate (middle size) 4 x TT Motor 4 x TT motor bracket1 x Mini cross wrench sleeve 1 x Allen wrench 1 x Screwdriver 1 x Screws pack ResourcesWIKI: www.waveshare.com/wiki/Robot-Chassis