Window catches, also known as hasps, are a type of hardware used to secure windows. They consist of two parts: a staple, which is attached to the window frame, and a hinged metal loop, which is attached to the window sash. When the loop is closed over the staple, it creates a secure closure that can be locked with a padlock or other security device. Hasps are commonly used in commercial buildings, but they can also be used in residential settings for added security.