I have seen some small houses in the city centre and some ground floor apartments have a kind of security ''fence'' on the inside of their windows.
Most of them seem to open and close ''accordion like'' laterally along the direction of the surface of the glass on the inside and function to stop entry if a window is forced open or glass broken. They seem to contain a locking mechanism also.
Can anyone explain to me
1) What name to refer to them as ?
2) Where one might obtain one ?
3) How much they tend to cost ?
Most of them seem to open and close ''accordion like'' laterally along the direction of the surface of the glass on the inside and function to stop entry if a window is forced open or glass broken. They seem to contain a locking mechanism also.
Can anyone explain to me
1) What name to refer to them as ?
2) Where one might obtain one ?
3) How much they tend to cost ?