ALUMINUM FRONT KNUCKLE ARMS-12 PC SET UDR021 Suitable for TRAXXAS-1/7 UNLIMITED DESERT RACER Manual number: 8552 Product major function & usage STABILIZE THE CVD, FRONT & REAR ARMS IN ORDER TO ASSIST STEERING Major advantages of upgrading to this product: 1. THE MATERIAL IS UPGRADED FROM PLASTIC TO OUR ALUMINUM 6061 T6 WITH THE POM COLLARS TO MINIMIZE THE TOLERANCE HENCE THE BEARING IS ABLE TO TIGHT FIT INTO THE KNUCKLE ARMS FOR ACCURATE TURNING EASY TO PLUG AND PLAY WITH HIGHER ACCURACY POM IS A GOOD FIT TO PROTECT THE BEARING FROM FALLING OFF DUE TO FRICTION MULTIPLE HOLES FOR INSTALLING THE TIE RODS WITH THIS KNUCKLE ARMS Other special notes and commentsl: SST ROUND HEAD SCREW 3*23 USED FOR MOUNTING THE UPPER & LOWER HOLES 3*25 USED FOR MOUNTING THE TIE RODS WITH 3MM LOCK NUTS TO LOCK THE END 4*2.5*11 USED FOR STABILIZE THE BRAKE DISK MOUNT