1) SCX3-4412C4 Combo set include brass knuckle & Portal Cover Set & Scale Brake Rotor & 8mm hex combo set, you save 10%off on the combo and gain 315g of the weight.
2) SAMIX scale brake rotor & caliper for realistic looking crawler (the brake rotor suitable for STD SCX10-3 wheel)
3) Better center or gravity and forward weight bias for climbing (with adjustable weight system)
4) Made of high quality brass and etched with L and R for ease of installation
