Quick Change’ Hopping Foot Upgrade Kit for 20” Machines with round throats. This kit contains all of the parts you’ll need to install the ‘Quick Change’ Hopping Foot on your Lenni, Liberty or Discovery machine with round throat. Parts included are: Upper Shaft with matched bushings, coupler, and high profile closed toe True ¼” Quick Change Platform Hopping Foot. Supplies needed for old bushing removal and installation of new bushings are also included, along with installation instructions. Upper shaft and couplers are different within the 3 options available due to clearance issues, so be sure you’re ordering the correct version for your system. Please call APQS if you have any questions on the correct option for you!