SUPER easy install on my old craftsman yard tractor!!! One large bolt and its solid bolted down to seat frame. Also added a new power works cover to protect it from sun and rain. This is an old tractor from the early 90's so I was surprised how effortlessly both cover and seat went on. No messing trying to drill new holes or getting a bad fit. Sometimes things go JUST RIGHT (Ya, I know, it's few and far between on old stuff) BUT this was one of them. I couldn't be more pleased. After all these years the cost is chump change to have a new seat comfort with extra padding...Do yourself a favor, don't ride on an old worn-out shredded seat like I did for decades. I can absolutely recommend this seat as comfortable with back support.