Manual window openers are used extensively in public and commercial buildings for operating remote high level or difficult to access windows. Manual window openers are traditionally used in schools where a cost effective “child-safe” system is required. There are many types of window openers available, both manual and electric. The most popular manual window opener solution is to install window controls which can be used on most window styles. Single handed window openers can be used to operate single or multiple sets of windows. Other types of manual window controls available are the screwjack opener, designed for roof vent applications, fork and swivel for controlling pivoting louvre blades and a locking opener for bottom hung open in windows.