Hot Racing Axial SCX24 Aluminum Transmission Case. Features: CNC machined aluminum construction Replaces factory plastic transfer case housing Direct fit hop up requires no model modification for use Anodized black for durability, corrosion resistance, and aesthetics Secondary-processed machined beveled edges High strength steel hardware Includes: (1) 2-piece transmission case (3) 8mm Cap screws (2) 4mm cap screw