Worked how to use the kit, just the 27/29mm special socket sits on top the the injector and you just push/ pull with a ratchet or prefably a king bar and slowly the injector moves and pulls itself up and out the hole but, I managed to snap the bolt that holds this injector so although I’ve freed this one I now have a job to drill bolt out and for some reason I could not get a drill bit to cut into this thread so having to get a mobile mech to come out to me ..... funny because the last bolt I snapped in another hole drilled out with ease and I managed to just replace with new bolt, no hassle !