This is an essential tool for replacing fork seal, It makes your installing fork seal job much easier, stop wasting your time to use PVC pipe, not only you can't find the right size, it overall is a messy process. Instead getting this professional tool specially made to do fork seal changing job. Your time worth so much more!This is a relatively new design, the two plastic adapters allow you to not damage the inner tube during seal driving, and ensures the fitting angle of the seals will always be correct. Flange shape design of steel body for less power and accurate operationhe kit comes with 6 adapter sizes (in mm):35/36, 40/41, 42/43, 45/46,47/48,49/50 they can be used for most conventional and upside down front forksThis kit comes 6 precise sizes, it is more accurate than adjustable fork seal driver, but at the same time with one kit you are getting 6 fork seal drivers, which normally at least costs $30 -$40 for a set.