These simple concealed restrictors fit in the hinge gap / groove between sash and frame and are designed to restrict the window opening to 100mm, conforming to BS6375 Pt2: 1987
Easy to fix to either top or side hung casements and supplied with a choice of packers to suit different window sections including timber, aluminium and PVCu
Constructed from stainless steel and zinc alloy
Additionally this restrictor has a simple key mechanism to allow full opening of the window
Automatically engages and locks when the window shuts
Pack contains: 2 x locks, 2 x locking pins, 4 x packers & 2 x keys