The hinged toilet riser raises the toilet seat 3.5″ and hinges to make it easy to clean. The two piece unit locks together and will raise up with the seat to allow the user to wipe down under the riser. It also gives the user an extra 3.5″ rise which allows for the user to get on and off with minimal knee and hip bend. Easy to install with only two included bolts, it is ready to use in minutes! Fits standard bowls: 17″ x 13″