Woodcraft Axle Sliders. Woodcraft axle sliders are designed for racers with a focus on ease of use and practicality. Woodcraft axle sliders help to protect the valuable fork lowers and swingarm on your bike in the case of a crash. Woodcraft worked long and hard on their axle slider design to ensure they add as little time to a wheel change as possible. No more dealing with through rods, simply pull the quick release pin and you're ready for a wheel change. Woodcraft's pucks receive the perpendicular mount passed down from their patented frame sliders to provide a solid sliding surface, maximizing puck life. Only add five seconds to a wheel change! Note: Sliders for ONE axle. Note: Works for Front or Rear for Ninja 400/500 and Z400, Rear ONLY for ZX-4R/RR.  Incompatible with OEM mufflers.