This raised seat allows you to add on your own seat and lid. Long bolts are provided along with wing nuts and washer. I have installed one for my husband and another for my 91 year old mother. It took me about 20 minutes to assemble. The elongated model fit my mother's toilet more fully than our rounded model. As was stated in other reviews, the seat does slide from side to side slightly. I have not yet decided if I will solve this issue with 2 sided tape. My husband who has ALS, finds it easier to get off the toilet using the raised arm rests. It is easier now for me to assist him in getting up. My mother also finds it much easier to raise herself up. I would buy this product again.