The hyd. kit has everything you need to install and operate your existing thumb with a foot operated+1 Looking at the same thumb for my backhoe. Same thumb can be hydraulic or not, just depends on how deep your pockets are. I've been wanting to inquire if the hydraulic option comes with the OEM controls and all, or if it is just the thumb and hydraulics. Awful spendy if it doesn't have the controls and all with it...