These are in fact for 1/18th extent rc cars. Its pretty simple to assemble. The plastic seems abit cheap and will tend to break especially the end cap for the shock body as it did on me when i snapped it into place including moderate force. There are better ones online for this price. will require shock oil - Master Woo Team Associated 21216 18T Factory Team Front Blue Aluminum Shock Kit Team Associated/Reedy/LRP/XP Digital/Factory Team are manufacturers of distinguished feature radio top bolt from the blue cars, motors, batteries, electronics and accessories.