All parts are sold as each unless noted below. -Classic - Allen kingpin for use on Classic plates (Use on Century NTS for a couple extra millimeters of ground clearance when rolling on 32mm Original wheels) -Super X - Standard kingpin for Super X, Century, Century NTS, Cyclone, Cyclone NTS, Competitor, Jogger plates. -Harry Stud - Reverse kingpin retrofit for Super X, Century, Century NTS, Cyclone, Cyclone NTS, Competitor, XK4, or Jogger plate -Snyder SuperTuff - Standard Snyder Super Deluxe and Imperial replacement kingpin -LoRide King Pin only for use on LoRide style plates Kingpin adjuster nut - for use with the Harry stud and ROCK or Probe (4 pack) Kingpin Jam nut - for use on the Classic, Cyclone, XK4, Super X, Century, Century NTS, and Harry stud to secure kingpin (4 pack) Snyder Advantage Kingpin- PICTURE NOT SHOWNPower Trac Kingpin - PICTURE NOT SHOWN