Add-ons:Brake Disk-2pcsStainless steel Pin 2x11-2pcshandbook quantity:1654Product major function & usage:1. Combine tires and front & right back wheel shaft for smooth turning2. Good design partMajor benefits of updating with this specific product:1. Modern metallic design with swirl engraving regarding outside musical business.2. Equate to initial 6mm, this component is established 8mm to widen the wheel track for better security using this chassis.3. Unique design of hex claw to hold the wheel hub tightly, more stable and makes the wheel more powerful.Other unique papers and remarks:This item can not be in conjunction with GPM Racing #SSLA1277RH, SSLA1280FH, SSLA1277RHA, SSLA1280FHA, SSLA1280FH21, SSLA1277RH22