Attaches easily to most commodes without tools. Clamp-on locking mechanism tightens easily with one hand. Comfortable, contoured seat made of easy-to-clean, durable, molded plastic. Raises existing seat 5-1/2"; allows internal rotation of hips. Non-skid pads prevent seat from slipping. Rear seat wings for more secure attachment. Deep front recess for hygiene. Weight capacity: 250lbs. Lifetime limited warranty.