Fork Spring Compressor works with most upside-down street bike and motorcycle forks. Designed to compress the fork springs to gain access to the upper cap locknut for assembling and disassembling. It can also be used to replace seals, springs, and bushings. Built from durable metal to suit a range of motorcycle fork spring models. Simple screw-in pins allow secure positioning on the spring top spacer, making operation easier when the fork tubes are close to the top. Key benefits - Safe, controlled compression to access the upper cap locknut during fork maintenance - Versatile usage for seals, springs, and bushings replacement - Durable metal construction for broad compatibility Use scenarios - Servicing inverted USD forks on a street bike: compress the spring to remove or fit the top cap locknut. - Fork seal and bushing replacement during routine maintenance. - Upgrading or swapping fork springs on various motorcycle fork models.