Insert Diameter: 10mm
Stop Projection: 19mm
Strike Plate: 26mm x 19mm x 2mm
Designed to restrict the movement of your sash window. Can be fitted to the frame/box and prevents the sash being opened beyond that point. Ideal for windows on upper floors where children can be left unattended, offering peace of mind & that extra bit of security. Sold as a set of four (enough for 2 windows).