These bi-fold door knobs are constructed of plastic and come brown in color. They feature knobs with a large 1-13/16 in. diameter pull for easy gripping, and a 3/4 in. outside diameter base. These knobs have a 1 in. projection, and they can be installed on hollow core and solid doors. This pack of 10 bi-fold door knobs comes complete with 10 fasteners, they are simple to install and used by many wardrobe door manufacturers.