Minis have been fitted with metric threaded rubber springs since 1976, so many owners do not need the STL0010 deluxe tool with both metric and standard threaded tips. We now offer a single tip tool that reduces the price and still gets the job done. All new cones have metric threads.
If you are uncertain about which threads are in your cones due to unknown history, then buy the STL0010 dual-tip tool so you can remove both types of cones.
Be careful not to damage the threads of the cone or tool during operation.