A window blind is a type of window covering. There are many different kinds of window blinds that use a variety of control systems. A typical window blind is made up of several long horizontal or vertical slats of various types of hard material, including wood, plastic or metal which are held together by cords that run through the blind slats. Window blinds can be maneuvered with either a manual or remote control by rotating them from an open position, with slats spaced out, to a closed position where slats overlap and block out most of the light. There are also several types of window coverings, called shades, that use a single piece of soft material instead of slats.
Custom made roller blinds come in block out, translucent and sunscreen options. They are mounted on a metal headrail and operated with a side chain or spring mechanism. Cheaper and readymade blinds often come with a PVC pole instead of a metal headrail. They are widely used in Australia, Spain, and many other countries.
Wooden blinds are generally known as Venetian blinds. Many horizontal wooden slats are joined together by corded pulleys which can either gather all the slats at the top of the window to reveal the view or simply angle the slats while allowing some light to travel through the blind yet retaining some level of privacy. Wooden blinds come in many finishes (determined by the type of wood used, which ranges from painted to most types of solid oak varieties) and sizes (determined by the width of each slat which is usually available in one of three widths—25 mm, 35 mm or 50 mm).