Door hardware is an important part of any door, and includes items such as hasps, hinges, latches, locksets, and knockers. A HASP is a metal loop that is used to secure a door or lid, and is usually attached to the door with screws. Hinges are used to attach a door to a frame, and allow it to swing open and closed. A LATCH is a device used to hold a door closed, and is usually operated by a handle or knob. A lockset is a combination of a lock and a handle, and is used to secure a door. Lastly, knockers are decorative pieces of metal that are attached to the outside of a door, and are used to make a sound when someone knocks on the door.