Sold in a pack of two. Unique handle slot allows the addition of a cord for people with limited reach. This 13cm extension handle fits over standard doorknobs and allows complete access to keyholes. Use the handle slot to add a loop of cord for those with limited grasping ability. The Doorknob Extender fits round doorknobs that measure from 5.4cm to 6.0cm in diameter and installs with just a screwdriver.