Designed with a gentle slope on the left or right side for people with leg or knee injuries who require an extended leg position. Adds 4″ (10 cm) to the bowl height. With Lok-In-El® Bracket. Available in a left or right side relief. Standard toilet seats come with a Slip-In Lok-In-El® bracket that easily slides under the hinge pin of the existing toilet seat while two large posts meet to the raised toilet seat, providing a secure fit. Full inner ring contact with the bowl is not required.