A casement fastener is a type of latch or lock that is used to secure casement windows. Casement windows are windows that are attached to their frame by one or more hinges on the side, allowing them to swing open like a door.A casement fastener typically consists of a lever or a knob that is attached to a catch, which engages with a striking plate or a receiver to hold the window in place when closed. The lever or knob is usually located on the inside of the window and can be easily operated to open and close the window.SpecificationsManufacturer: TradcoPart code: 2310Material: Solid BrassScrews: IncludedWarranty: 12 monthsWidth: 40mmProjection: 30mmBolt Throw: 25mm