Kyosho MDW102 Aluminum Rear Suspension Holder increases straight-line speed, control, and suspension performance over uneven surfaces. It absorbs vibration and optimizes suspension movement for improved handling. Rear caster angle and toe angle can be adjusted by replacing the suspension holder for various performance characteristics. Choose from different toe angle options (2, 3, or 4 degrees) and caster angle options (0 or 2 degrees) to fine-tune your Mini-Z AWD's handling to suit your driving style and track conditions. Installation is straightforward, requiring only a Phillips screwdriver.