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 4.5"; allows internal rotation of hips. Non-skid pads prevent seat from slipping. Rear seat wings for more secure attachment. Deep front recess for hygiene. Dimensions: seat width & depth 17", arm height 7", width between arms 19.25". Product weight:7lbs, weight capacity: 300 lb. 3-year limited warranty.