Replace rear axle bolts (set of 2), compatible with: Crazy Cart (version 7+)Crazy Cart Shift Each of these two axles consists of a female barrel nut, a male threaded fastener, and a pair of spacers. Razor Part #W25143494195 Note: Model versions can be determined based on the product ID code on your Razor product. The product ID code can be found on the battery cover and/or on the bottom of the frame. The 7th and 8th numbers in your product ID code are the version number of your Razor product (e.g. "01" = Version 1, "02" = Version 2, etc.).