Add-ons:Brake Disk-2pcsStainless steel Pin 2x11-2pcshandbook quantity:1654Product major function & use:1. Combine tires and front & straight back wheel shaft for smooth turning2. Good decoration partMajor benefits of upgrading with this item:1. Modern metallic design with swirl engraving regarding exterior musical organization.2. Compare with initial 6mm, this component is created 8mm to widen the wheel track for better security with this chassis.3. Unique design of hex claw to put on the wheel hub tightly, more stable and makes the wheel more powerful.Other unique documents and remarks:This item cannot be coupled with GPM Racing #SSLA1277RH, SSLA1280FH, SSLA1277RHA, SSLA1280FHA, SSLA1280FH21, SSLA1277RH22