There are usually two types on conventional UPVC windows: Cockspur & Espag handles. The older type Cockspur handles fasten by swinging over the edge of the frame. The newer type Espag handles fasten into the frame with a spindle operating a mechanism inside the opening window.

Cockspur Handles UPVC CASEMENT WINDOW HANDLE more info... price: £8.00

Espag Handles UPVC WINDOW HANDLE BEST BUY more info... price: £3.00