The two single rollers that attached to the drawer were really easy. No instructions were provided or necessary. The pair of rollers that attach to the base were much more difficult. The printed insrtuctions were for a Kitchen Aid compactor. I have an early Jenn-Air. The instructions were not quite good enough as the part construction had changed but I watch a YouTube video. That plus the instructions and having taken the whole machine apart a few weeks before enabled me to get it done properly. It was harder than the YouTube but I have a lot of tools and got it done in about an hour. Next time it would not take more that 20 minutes on the same machine. I needed a small Vice Grip and a large socket set to get the old rollers out. The rest was easy. It rolls great. I still have to adjust the tilt because it rolls a few inches by itself. That will take 10 minutes.