The Sachtler Upgrade Kit Dolly S to Dolly Flowtech Studio includes all the components you need, not including tools, to convert your Dolly S to a Dolly Flowtech Studio. This is an end user procedure, so there is no need to send your Dolly S in to the shop to be converted. A flat head screwdriver (not included) is required to remove the retaining screws that hold the Dolly S retaining foot in place. Once that is removed, install the replacement feet and you are ready to go